Leah+Test


 * || **Report:** || **Missed Questions
 * **Program:** || **Algebra II**  ||
 * **Test:** || **TEST TEST TEST on QUADRATICS QUADRATICS QUADRATICS**  ||
 * **User:** || **RICKERT, LEAH**  ||
 * **Session Date:** || **03/31/11 - 9:07 AM CST**  ||
 * **% Correct:** || **(15/20) 75.0%**  ||
 * **Correct Questions:** || **15**  ||
 * **Missed Questions:** || **5**  || ||
 * **Missed Questions:** || **5**  || ||

Will the graph of the equation above intersect the x-axis in zero, one, or two points?
 * View Missed | View Correct | View All ||
 * || ||  || 16x + 2 = -8x2
 * || ||  || 16x + 2 = -8x2

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


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

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


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

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


 * || Answered Incorrect: || || || **A.** || y = x-2 || ||
 * || || || **B.** || y = x2 - 1 || ||
 * || Correct Answer: || || || **C.** || y = -x2 || ||
 * || || || **D.** || y = [[image:http://www85.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 Correct: || || || **A.** || zero || ||
 * || || || **B.** || one || ||
 * || || || **C.** || There is not enough information. || ||
 * || || || **D.** || two || ||

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


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

|| ||  || y = -2x2 + 10x + 24 Will the parabola of this equation open upward or downward? || ||


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

|| ||  || || **x** || **y** || Which of the following equations matches the table shown above? || ||
 * -4 || -60 ||
 * -3 || -63 ||
 * -2 || -64 ||
 * -1 || -63 ||
 * 0 || -60 ||


 * || || || **A.** || //y// = //x//3 - 60 || ||
 * || || || **B.** || //y// = 4//x// - 44 || ||
 * || Answered Correct: || || || **C.** || //y// = //x//2 + 4//x// - 60 || ||
 * || || || **D.** || //y// = //x2 - 4//x// - 60// || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = (x + 1)2 - 49
 * 1) y = x2 + 2x - 48
 * 2) y = (x + 8)(x - 6)
 * 3) y = x(x + 8) - 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.** || I. || ||
 * || || || **B.** || III. || ||
 * || Answered Correct: || || || **C.** || II. || ||
 * || || || **D.** || IV. || ||

|| ||  || Find the vertex of the parabola and indicate if it is a minimum or maximum for the function f(x) = 5(x - 7)2 - 1


 * || || || **A.** || vertex at (-7, 1) is a minimum || ||
 * || Answered Incorrect: || || || **B.** || vertex at (-7, 1) is a maximum || ||
 * || || || **C.** || vertex at (7, -1) is a maximum || ||
 * || Correct Answer: || || || **D.** || vertex at (7, -1) is a minimum || ||

|| ||  || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = (x + 6)2? || ||


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

|| ||  || The curve given by the equation //y// = 3//x//2 - 2 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. || ||
 * || || || **C.** || The graph will be shifted down. || ||
 * || Answered Correct: || || || **D.** || The graph will be shifted up. || ||

|| ||  || 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 - 3//x// + 160 If Vincente gained $200, how long did he have his money in the mutual fund? || ||


 * || || || **A.** || 9 years || ||
 * || || || **B.** || 7 years || ||
 * || || || **C.** || 5 years || ||
 * || Answered Correct: || || || **D.** || 8 years || ||

|| ||  || Find the vertex of the parabola and indicate if it is a minimum or maximum for the function f(x) = 5(x - 7)2 + 1


 * || || || **A.** || vertex at (-7, -1) is a minimum || ||
 * || Answered Incorrect: || || || **B.** || vertex at (7, 1) is a maximum || ||
 * || || || **C.** || vertex at (-7, -1) is a maximum || ||
 * || Correct Answer: || || || **D.** || vertex at (7, 1) is a minimum || ||

|| ||  || In which direction must the graph of f(x) = x2 be shifted to produce the graph of g(x) = x2 + 6? || ||


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

|| ||  || y = x2 + 9x + 18 What are the x-intercepts of the graph of the equation above? || ||


 * || Answered Correct: || || || **A.** || (-3, 0) and (-6, 0) || ||
 * || || || **B.** || (3, 0) and (-6, 0) || ||
 * || || || **C.** || (-3, 0) and (6, 0) || ||
 * || || || **D.** || (-3, 0) and (-4, 0) || ||

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = (x + 1)2 - 49
 * 1) y = x2 + 2x - 48
 * 2) y = (x + 8)(x - 6)
 * 3) y = x(x + 2) - 48

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


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

|| ||  || What is the equation for the axis of symmetry of the quadratic function //f(x)// = 5//x//2 + 30//x// - 10? || ||


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

|| ||  || A quadratic equation is written in 4 equivalent forms below. # y = (x + 1)2 - 49
 * 1) y = x2 + 2x - 48
 * 2) y = (x + 8)(x - 6)
 * 3) y = x(x + 2) - 48

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


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

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

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


 * || A = 102 m2 || || //x// - 3 ||
 * //x// + 8 ||  ||

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


 * || Correct Answer: || || || **A.** || 17 m by 6 m || ||
 * || || || **B.** || 51 m by 2 m || ||
 * || || || **C.** || 8 m by 3 m || ||
 * || Answered Incorrect: || || || **D.** || 9 m by 14 m || ||

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