Keith+Test


 * || **Report:** || **Missed Questions
 * **Program:** || **Algebra II**  ||
 * **Test:** || **TEST TEST TEST on QUADRATICS QUADRATICS QUADRATICS**  ||
 * **User:** || **WAITE, KEITH**  ||
 * **Session Date:** || **03/31/11 - 9:21 AM CST**  ||
 * **% Correct:** || **(14/20) 70.0%**  ||
 * **Correct Questions:** || **14**  ||
 * **Missed Questions:** || **6**  || ||
 * **Missed Questions:** || **6**  || ||


 * View Missed | View Correct | View All ||
 * || ||  || A quadratic equation is written in 4 equivalent forms below. # y = x2 - 18x + 80
 * 1) y = (x - 8)(x - 10)
 * 2) y = (x - 9)2 - 1
 * 3) y = x(x - 8) - 10(x - 8)
 * 1) y = x(x - 8) - 10(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.** || II. || ||
 * || || || **B.** || III. || ||
 * || || || **C.** || IV. || ||
 * || Answered Correct: || || || **D.** || I. || ||

|| ||  || 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// - 145 If Vincente lost $100, how long did he have his money in the mutual fund? || ||


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

|| ||  || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = x2 + 8? || ||


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

|| ||  || Find the vertex of the parabola and indicate if it is a minimum or maximum for the function f(x) = 7(x - 5)2 + 3


 * || Answered Incorrect: || || || **A.** || vertex at (5, 3) is a maximum || ||
 * || || || **B.** || vertex at (-5, -3) is a minimum || ||
 * || || || **C.** || vertex at (-5, -3) is a maximum || ||
 * || Correct Answer: || || || **D.** || vertex at (5, 3) is a minimum || ||

|| ||  || y = -3x2 + 11x + 28 Will the parabola of this equation open upward or downward? || ||


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

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


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

|| ||  || 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? || ||


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

|| ||  || What is the equation for the axis of symmetry of the quadratic function //f(x)// = 5//x//2 + 20//x// - 4? || ||


 * || Answered Incorrect: || || || **A.** || //x// = 5 || ||
 * || || || **B.** || //x// = 2 || ||
 * || || || **C.** || //x// = -4 || ||
 * || Correct Answer: || || || **D.** || //x// = -2 || ||

|| ||  || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = (x + 8)2? || ||


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

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = x2 - 18x + 80
 * 1) y = (x - 8)(x - 10)
 * 2) y = (x - 9)2 - 1
 * 3) y = x(x - 18) + 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.** || I. || ||
 * || Answered Correct: || || || **C.** || II. || ||
 * || || || **D.** || III. || ||

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

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

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


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

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

|| ||  || 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.//) || ||


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

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

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


 * || A = 68 m2 || || //x// - 4 ||
 * //x// + 9 ||  ||

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


 * || || || **A.** || 34 m by 2 m || ||
 * || Correct Answer: || || || **B.** || 17 m by 4 m || ||
 * || Answered Incorrect: || || || **C.** || 8 m by 13 m || ||
 * || || || **D.** || 9 m by 4 m || ||

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


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

|| ||  || y = x2 - 6x + 9 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 Incorrect: || || || **A.** || zero || ||
 * || Correct Answer: || || || **B.** || one || ||
 * || || || **C.** || two || ||
 * || || || **D.** || There is not enough information. || ||

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


 * || Answered Correct: || || || **A.** || (-3, 0) and (-7, 0) || ||
 * || || || **B.** || (-3, 0) and (7, 0) || ||
 * || || || **C.** || (3, 0) and (-7, 0) || ||
 * || || || **D.** || (-2, 0) and (-4, 0) || ||

|| ||  || Find the vertex of the parabola and indicate if it is a minimum or maximum for the function f(x) = 7(x - 5)2 - 3


 * || || || **A.** || vertex at (-5, 3) is a minimum || ||
 * || || || **B.** || vertex at (-5, 3) is a maximum || ||
 * || || || **C.** || vertex at (5, -3) is a maximum || ||
 * || Answered Correct: || || || **D.** || vertex at (5, -3) is a minimum || ||

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