Devon+Test


 * || **Report:** || **Missed Questions
 * **Program:** || **Algebra II**  ||
 * **Test:** || **TEST TEST TEST on QUADRATICS QUADRATICS QUADRATICS**  ||
 * **User:** || **KYLOR, DEVON**  ||
 * **Session Date:** || **03/31/11 - 11:23 AM CST**  ||
 * **% Correct:** || **(13/20) 65.0%**  ||
 * **Correct Questions:** || **13**  ||
 * **Missed Questions:** || **7**  || ||
 * **Missed Questions:** || **7**  || ||


 * View Missed | View Correct | View All ||
 * || ||  || A quadratic equation is written in 4 equivalent forms below. # y = x(x - 14) + 48
 * 1) y = (x - 7)2 - 1
 * 2) y = x2 - 14x + 48
 * 3) y = (x - 6)(x - 8)
 * 1) y = (x - 6)(x - 8)

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


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

|| ||  || y = x2 + 9x + 14 What are the x-intercepts of the graph of the equation above? || ||


 * || || || **A.** || (2, 0) and (-7, 0) || ||
 * || Answered Correct: || || || **B.** || (-2, 0) and (-7, 0) || ||
 * || || || **C.** || (-2, 0) and (7, 0) || ||
 * || || || **D.** || (-1, 0) and (-4, 0) || ||

|| ||  || 3x2 - 2x = -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.//) || ||


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

|| ||  || 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 - 1? || ||


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

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


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

|| ||  || 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 = x-2 || ||
 * || Answered Correct: || || || **B.** || y = -x2 || ||
 * || || || **C.** || y = [[image:http://www85.studyisland.com/userfiles/sqrt.gif]]x || ||
 * || || || **D.** || y = x2 - 1 || ||

|| ||  || What is the equation for the axis of symmetry of the quadratic function //f(x)// = 4//x//2 + 16//x// - 10? || ||


 * || || || **A.** || //x// = 2 || ||
 * || || || **B.** || //x// = 4 || ||
 * || || || **C.** || //x// = -4 || ||
 * || Answered Correct: || || || **D.** || //x// = -2 || ||

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


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

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


 * || Answered Correct: || || || **A.** || //y// = //x//2 - 2//x// - 80 || ||
 * || || || **B.** || //y// = //x2 + 2//x// - 80// || ||
 * || || || **C.** || //y// = //x//3 - 77 || ||
 * || || || **D.** || //y// = -2//x// - 79 || ||

|| ||  || y = -4x2 + 10x + 21 Will the parabola of this equation open upward or downward? || ||


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

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = x(x - 6) - 8(x - 6)
 * 1) y = (x - 7)2 - 1
 * 2) y = x2 - 14x + 48
 * 3) y = (x - 6)(x - 8)

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


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

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


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

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = x(x - 14) + 48
 * 1) y = (x - 7)2 - 1
 * 2) y = x2 - 14x + 48
 * 3) y = (x - 6)(x - 8)

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


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

|| ||  || y = x2 - 2x - 48 Which of the following tables matches the equation shown above? || || **x** || **y** ||
 * 0 || -48 ||
 * 1 || -49 ||
 * 2 || -48 ||
 * 3 || -45 || ||  || || **x** || **y** ||
 * 0 || -48 ||
 * 1 || -49 ||
 * 2 || -48 ||
 * 3 || 51 || ||  || || **x** || **y** ||
 * 0 || -41 ||
 * 1 || -49 ||
 * 2 || -41 ||
 * 3 || -45 || ||  || || **x** || **y** ||
 * 0 || -46 ||
 * 1 || -52 ||
 * 2 || -46 ||
 * 3 || -45 || ||
 * **W** ||  || **X** ||   || **Y** ||   || **Z** || || ||


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

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


 * || A = 26 m2 || || //x// - 4 ||
 * //x// + 7 ||  ||

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


 * || || || **A.** || 6 m by 9 m || ||
 * || Correct Answer: || || || **B.** || 13 m by 2 m || ||
 * || || || **C.** || 7 m by 4 m || ||
 * || Answered Incorrect: || || || **D.** || 12 m by 5 m || ||

|| ||  || Find the vertex of the parabola and indicate if it is a minimum or maximum for the function f(x) = 8(x - 1)2 + 1


 * || || || **A.** || vertex at (1, 1) is a maximum || ||
 * || || || **B.** || vertex at (-1, -1) is a minimum || ||
 * || Answered Correct: || || || **C.** || vertex at (1, 1) is a minimum || ||
 * || || || **D.** || vertex at (-1, -1) is a maximum || ||

|| ||  || Find the vertex of the parabola and indicate if it is a minimum or maximum for the function f(x) = 8(x - 1)2 - 1


 * || || || **A.** || vertex at (-1, 1) is a maximum || ||
 * || Correct Answer: || || || **B.** || vertex at (1, -1) is a minimum || ||
 * || Answered Incorrect: || || || **C.** || vertex at (-1, 1) is a minimum || ||
 * || || || **D.** || vertex at (1, -1) is a maximum || ||

|| ||  || 10x + 1 = -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.** || There is not enough information. || ||
 * || || || **B.** || one || ||
 * || Answered Correct: || || || **C.** || two || ||
 * || || || **D.** || zero || ||

|| ||  || 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 - 5//x// - 336 If Vincente lost $300, how long did he have his money in the mutual fund? || ||


 * || Answered Incorrect: || || || **A.** || 8 years || ||
 * || Correct Answer: || || || **B.** || 9 years || ||
 * || || || **C.** || 10 years || ||
 * || || || **D.** || 4 years || ||

|| ||  || y = x2 - 4x + 4 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.//) || ||


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

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