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FUNCTIONS
Test Description: Parabolas and questions
Instructions: Answer all questions to get your test result.
1) 1. What is the equation of the axis of symmetry for the parabola y=-2x^2? Assume that the turning point (maximum point) is (1,6).
A
y=2
B
y=1
C
y=1
D
y=2
2) ^Will the graph of the parabola y = -2x2 + 4x - 4 open upward or downward?
A
upward
B
downward
3) Which of the following statements is absolutely NOT true for the parabola y=(x+1)^2
A
The axis of symmetry is x = -1.
B
The x-intercept is (-1,0)
C
The axis of symmetry is y = -1.
D
The axis of symmetry is x = -1.
4) What is the equation of the axis of symmetry of the graph y = 3x^2 + 12x - 2 ?
A
x=2
B
y=2
C
x=-2
D
y=-2
5) Which is the equation for the parabola at points (3,0) and (-1,0)?
A
y = x^2- 2x - 3
B
y = -x^2 -2x - 4
C
y = -x^2 + 2x + 4
D
y = -x^2 - 4
6) What are the roots of the parabola y = x^2- 2x - 3 ?
A
3 and -1
B
-4 and 0
C
3 and 1
D
1 and 0
7) What is the turning point, or vertex, of the parabola whose equation is y = 3x^2 + 6x - 1?
A
(3,44)
B
(1,8)
C
(-3,8)
D
(-1,-4)
8) For which quadratic equation (parabola) is the axis of symmetry x = 3?
A
y = -x2 + 6x + 2
B
y = -x2 + 3x + 5
C
y = x2 + 6x + 3
D
y = x2 + x + 3
9) A baseball player throws a ball from the outfield toward home plate. The ball\'s height above the ground is modeled by the equation y = -16x2 + 48x + 6, where y represents height,
A
54 feet
B
48 feet
C
42 feet
D
76 feet
10) The height, y, in feet, a ball will reach when thrown in the air is given by the equation y = -16x2 + 30x + 6. Find to the nearest tenth, the maximum height, in feet, the ball wi
A
39.3 feet
B
20.1 feet
C
33.2 feet
D
20.0 feet
*select an answer for all questions
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