hannah+roddy


 * || **Report:** || **All Questions
 * **Program:** || **Algebra II**  ||
 * **Test:** || **Working With Quadratics**  ||
 * **User:** || **RODDY, HANNAH**  ||
 * **Session Date:** || **03/03/11 - 9:08 AM CST**  ||
 * **% Correct:** || **(21/33) 63.6%**  ||
 * **Correct Questions:** || **21**  ||
 * **Missed Questions:** || **12**  || ||
 * **Missed Questions:** || **12**  || ||

The curve given by the equation //y// = 3//x//2 - 3 is graphed above. How will the graph of the equation be affected if the equation is changed to //y// = -3//x//2 - 3? || ||
 * View Missed | View Correct | View All ||
 * || ||  || [[image:http://media.studyisland.com/fGraphs/FD755AEF17DDE858F7BB829617BF716A.png]]
 * || ||  || [[image:http://media.studyisland.com/fGraphs/FD755AEF17DDE858F7BB829617BF716A.png]]


 * || || || **A.** || The graph will be wider. || ||
 * || || || **B.** || The graph will be shifted down. || ||
 * || || || **C.** || The graph will be the same. || ||
 * || Answered Correct: || || || **D.** || The graph will open down. || ||

|| ||  || Vincente put his money into a mutual fund, where the amount of money he earned or lost can be found using the equation below, where //M// is the money Vincente earned or lost and //x// is time in years. //M// = //x//2 - 4//x// + 255 If Vincente gained $300, how long did he have his money in the mutual fund? || ||


 * || || || **A.** || 10 years || ||
 * || || || **B.** || 8 years || ||
 * || Answered Correct: || || || **C.** || 9 years || ||
 * || || || **D.** || 5 years || ||

|| ||  || Which of the following represents the equation of a parabola that opens down and is narrower than the graph of //y// = //x//2? || ||


 * || || || **A.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%20%5Cfrac%7B1%7D%7B5%7Dx%5E%7B2%7D%5C%20-%5C%209x%5C%20+%5C%2015]] || ||
 * || Answered Incorrect: || || || **B.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%20-%5Cfrac%7B1%7D%7B5%7Dx%5E%7B2%7D%5C%20+%5C%209x%5C%20+%5C%2015]] || ||
 * || Correct Answer: || || || **C.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%20-5x%5E%7B2%7D%5C%20+%5C%209x%5C%20+%5C%2015]] || ||
 * || || || **D.** || [[image:http://media.studyisland.com/cgi-bin/mimetex.cgi?y%5C%20=%5C%205x%5E%7B2%7D%5C%20-%5C%209x%5C%20+%5C%2015]] || ||

|| ||  || y = x2 - 64 Which of the following tables matches the equation shown above? || || **x** || **y** ||
 * -1 || -63 ||
 * 0 || -64 ||
 * 1 || -63 ||
 * 2 || 68 || ||  || || **x** || **y** ||
 * -1 || -60 ||
 * 0 || -64 ||
 * 1 || -60 ||
 * 2 || -60 || ||  || || **x** || **y** ||
 * -1 || -61 ||
 * 0 || -67 ||
 * 1 || -61 ||
 * 2 || -60 || ||  || || **x** || **y** ||
 * -1 || -63 ||
 * 0 || -64 ||
 * 1 || -63 ||
 * 2 || -60 || ||
 * **W** ||  || **X** ||   || **Y** ||   || **Z** || || ||


 * || || || **A.** || X || ||
 * || || || **B.** || W || ||
 * || Correct Answer: || || || **C.** || Z || ||
 * || Answered Incorrect: || || || **D.** || Y || ||

|| ||  || If the graph of the function y = x2 was to be reflected across the x-axis, what equation would correctly describe the new function? || ||


 * || || || **A.** || y = x2 - 1 || ||
 * || || || **B.** || y = x-2 || ||
 * || Answered Correct: || || || **C.** || y = -x2 || ||
 * || || || **D.** || y = [[image:http://www82.studyisland.com/userfiles/sqrt.gif]]x || ||

|| ||  || 3x2 - 2x = -3

Will the graph of the equation above intersect the x-axis in zero, one, or two points?

(//Use the quadratic formula to help you answer this question.//) || ||


 * || Answered Incorrect: || || || **A.** || one || ||
 * || || || **B.** || two || ||
 * || Correct Answer: || || || **C.** || zero || ||
 * || || || **D.** || There is not enough information. || ||

|| ||  || The curve given by the equation //y// = 3//x//2 - 3 is graphed above. How will the graph of the equation be affected if the equation is changed to //y// = 3//x//2 + 2? || ||


 * || || || **A.** || The graph will be the same. || ||
 * || || || **B.** || The graph will be wider. || ||
 * || Answered Correct: || || || **C.** || The graph will be shifted up. || ||
 * || || || **D.** || The graph will be shifted down. || ||

|| ||  ||  Which of the following equations fits this graph? || ||


 * || || || **A.** || y = 2x2 + 4x + 1 || ||
 * || Answered Incorrect: || || || **B.** || y = -2x2 + x + 1 || ||
 * || Correct Answer: || || || **C.** || y = -2x2 + 4x + 1 || ||
 * || || || **D.** || y = 2x2 + 2x - 1 || ||

|| ||  || y = x2 + 4x - 21 What are the x-intercepts of the graph of the equation above? || ||


 * || Correct Answer: || || || **A.** || (-7, 0) and (3, 0) || ||
 * || Answered Incorrect: || || || **B.** || (-7, 0) and (-3, 0) || ||
 * || || || **C.** || (7, 0) and (3, 0) || ||
 * || || || **D.** || (7, 0) and (-3, 0) || ||

|| ||  || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = x2 + 9? || ||


 * || || || **A.** || right || ||
 * || || || **B.** || left || ||
 * || || || **C.** || down || ||
 * || Answered Correct: || || || **D.** || up || ||

|| ||  || Dale is 7 years older than Chip. The product of their ages is 540. How old is Dale? || ||


 * || || || **A.** || 20 || ||
 * || || || **B.** || 34 || ||
 * || || || **C.** || 13 || ||
 * || Answered Correct: || || || **D.** || 27 || ||

|| ||  || y = x2 + 4x - 21 What are the x-intercepts of the graph of the equation above? || ||


 * || Answered Correct: || || || **A.** || (-7, 0) and (3, 0) || ||
 * || || || **B.** || (-7, 0) and (-3, 0) || ||
 * || || || **C.** || (7, 0) and (3, 0) || ||
 * || || || **D.** || (7, 0) and (-3, 0) || ||

|| ||  || y = 5x2 + 12x + 32 Will the parabola of this equation open upward or downward? || ||


 * || || || **A.** || There is not enough information. || ||
 * || || || **B.** || downward || ||
 * || Answered Correct: || || || **C.** || upward || ||

|| ||  || Annalise, Torah, and Samantha are cousins. Annalise is 5 years older than Torah, and Samantha is 3 years older than Annalise. If the product of Annalise's and Samantha's ages is 340, how old is Annalise? || ||


 * || || || **A.** || 29 || ||
 * || || || **B.** || 20 || ||
 * || Answered Correct: || || || **C.** || 17 || ||
 * || || || **D.** || 12 || ||

|| ||  || || **x** || **y** || Which of the following equations matches the table shown above? || ||
 * -3 || -77 ||
 * -2 || -80 ||
 * -1 || -81 ||
 * 0 || -80 ||
 * 1 || -77 ||


 * || || || **A.** || //y// = //x2 - 2//x// - 80// || ||
 * || Answered Correct: || || || **B.** || //y// = //x//2 + 2//x// - 80 || ||
 * || || || **C.** || //y// = //x//3 - 77 || ||
 * || || || **D.** || //y// = 2//x// - 71 || ||

|| ||  || What is the equation for the axis of symmetry of the quadratic function //f(x)// = 5//x//2 + 30//x// - 18? || ||


 * || Answered Correct: || || || **A.** || //x// = -3 || ||
 * || || || **B.** || //x// = 5 || ||
 * || || || **C.** || //x// = 3 || ||
 * || || || **D.** || //x// = -6 || ||

|| ||  || If the graph of f(x) = x2 is shifted up 9 units, then what would be the equation of the new graph? || ||


 * || Answered Correct: || || || **A.** || g(x) = x2 + 9 || ||
 * || || || **B.** || g(x) = x2 - 9 || ||
 * || || || **C.** || g(x) = (x - 9)2 || ||
 * || || || **D.** || g(x) = (x + 9)2 || ||

|| ||  || What is the x-coordinate of the vertex for the parabola defined by the function y = 5x2 + 9x - 9? || ||


 * || || || **A.** || -9 || ||
 * || || || **B.** || 9/10 || ||
 * || Correct Answer: || || || **C.** || -9/10 || ||
 * || Answered Incorrect: || || || **D.** || -5/18 || ||

|| ||  || y = x2 + 2x - 15 Will the graph of the equation above intersect the x-axis in zero, one, or two points?

(//Use factoring to help you answer this question.//) || ||


 * || || || **A.** || zero || ||
 * || Answered Correct: || || || **B.** || two || ||
 * || || || **C.** || one || ||
 * || || || **D.** || There is not enough information. || ||

|| ||  || Phil hit 10 more home runs than Charlie did last season. The product of their home runs from last season is 375. How many home runs did Charlie hit last season? || ||


 * || Answered Correct: || || || **A.** || 15 || ||
 * || || || **B.** || 365 || ||
 * || || || **C.** || 25 || ||
 * || || || **D.** || 35 || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = (x + 8)(x + 10)
 * 1) y = x(x + 18) + 80
 * 2) y = (x + 9)2 - 1
 * 3) y = x2 + 18x + 80

Which of the forms shown above would be the most useful if attempting to find the vertex of the quadratic equation? || ||


 * || || || **A.** || IV. || ||
 * || Correct Answer: || || || **B.** || III. || ||
 * || || || **C.** || II. || ||
 * || Answered Incorrect: || || || **D.** || I. || ||

|| ||  || y = x2 + 10x + 21 What are the x-intercepts of the graph of the equation above? || ||


 * || || || **A.** || (3, 0) and (7, 0) || ||
 * || Answered Correct: || || || **B.** || (-3, 0) and (-7, 0) || ||
 * || || || **C.** || (-3, 0) and (7, 0) || ||
 * || || || **D.** || (3, 0) and (-7, 0) || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = (x + 8)(x + 10)
 * 1) y = x(x + 18) + 80
 * 2) y = (x + 9)2 - 1
 * 3) y = x2 + 18x + 80

Which of the forms shown above would be the most useful if attempting to find the x-intercepts of the quadratic equation? || ||


 * || || || **A.** || IV. || ||
 * || || || **B.** || III. || ||
 * || || || **C.** || II. || ||
 * || Answered Correct: || || || **D.** || I. || ||

|| ||  || A kicker kicks a football during practice. The equation below can be used to find the height (//h//) in feet of the football after //t// seconds. //h//(//t//) = -16//t//2 + 48//t// After how many seconds will the ball hit the ground? || ||


 * || Answered Correct: || || || **A.** || 3 || ||
 * || || || **B.** || 1 || ||
 * || || || **C.** || 48 || ||
 * || || || **D.** || 2 || ||

|| ||  || 28x + 8 = -8x2 Will the graph of the equation above intersect the x-axis in zero, one, or two points?

(//Use the quadratic formula to help you answer this question.//) || ||


 * || || || **A.** || one || ||
 * || Correct Answer: || || || **B.** || two || ||
 * || Answered Incorrect: || || || **C.** || zero || ||
 * || || || **D.** || There is not enough information. || ||

|| ||  || Clay built a dog pen based on the diagram below. The diagram is not drawn to scale.


 * || A = 114 m2 || || //x// - 4 ||
 * //x// + 9 ||  ||

What are the dimensions of the dog pen? || ||


 * || || || **A.** || 57 m by 2 m || ||
 * || Answered Correct: || || || **B.** || 19 m by 6 m || ||
 * || || || **C.** || 10 m by 15 m || ||
 * || || || **D.** || 9 m by 4 m || ||

|| ||  || y = -1x2 + 11x + 28 Will the parabola of this equation open upward or downward? || ||


 * || Answered Correct: || || || **A.** || downward || ||
 * || || || **B.** || There is not enough information. || ||
 * || || || **C.** || upward || ||

|| ||  || y = x2 + 10x + 21 What are the x-intercepts of the graph of the equation above? || ||


 * || || || **A.** || (3, 0) and (7, 0) || ||
 * || || || **B.** || (3, 0) and (-7, 0) || ||
 * || || || **C.** || (-3, 0) and (7, 0) || ||
 * || Answered Correct: || || || **D.** || (-3, 0) and (-7, 0) || ||

|| ||  || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = (x + 9)2? || ||


 * || || || **A.** || down || ||
 * || Answered Incorrect: || || || **B.** || up || ||
 * || Correct Answer: || || || **C.** || left || ||
 * || || || **D.** || right || ||

|| ||  || 2x2 + 4x = -2 Will the graph of the equation above intersect the x-axis in zero, one, or two points?

(//Use the quadratic formula to help you answer this question.//) || ||


 * || Correct Answer: || || || **A.** || one || ||
 * || Answered Incorrect: || || || **B.** || zero || ||
 * || || || **C.** || two || ||
 * || || || **D.** || There is not enough information. || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = (x + 8)(x + 10)
 * 1) y = x(x + 8) + 10(x + 8)
 * 2) y = (x + 9)2 - 1
 * 3) y = x2 + 18x + 80

Which of the forms shown above would be the most useful if attempting to find the y-intercept of the quadratic equation? || ||


 * || || || **A.** || II. || ||
 * || Correct Answer: || || || **B.** || IV. || ||
 * || || || **C.** || III. || ||
 * || Answered Incorrect: || || || **D.** || I. || ||

|| ||  ||  Which of the following equations fits this graph? || ||


 * || Answered Incorrect: || || || **A.** || y = 2x2 + 4x - 3 || ||
 * || || || **B.** || y = x2 - x - 3 || ||
 * || || || **C.** || y = x2 + 2x + 3 || ||
 * || Correct Answer: || || || **D.** || y = x2 + 2x - 3 || ||

|| ||  || If the graph of f(x) = x2 is shifted 9 units to the left, then what would be the equation of the new graph? || ||


 * || || || **A.** || g(x) = x2 + 9 || ||
 * || || || **B.** || g(x) = x2 - 9 || ||
 * || || || **C.** || g(x) = (x - 9)2 || ||
 * || Answered Correct: || || || **D.** || g(x) = (x + 9)2 || ||

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