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Key Quiz 5.6
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1
Find the axis of symmetry for the parabola shown:
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A)x = —2
B)x = —1
C)x = 2
D)x = 5
2
Find the axis of symmetry of y = 3(x - 4)(x + 2)
A)x = 1
B)x = 2
C)x = 3
D)x = 4
3
Find the zeros by factoring or graphing: y = 3/4¾x2 - 12
A)-4
B)4
C)-4 and 4
D)-4, 0, and 4
4
For what positive value(s) of k will the area of the rectangle shown have a value of 180 in.2?
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A)k = 2/7in.
B)k = ½ in.
C)k = 2/7in. or k = ½ in.
D)k = 2 in.
5
An small arch is to be built to celebrate the town of Whoville’s centenary.
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The equation of the outer edge of the parabola can be modelled by the equation h = -0.4v2 + 5.6v - 9.6, where h and v measure horizontal and vertical distance in metres. If the arch is to be 1 m thick at the bases and 2 m thick at the vertex, what is the equation in standard form of the inner edge of the arch?
A)h = -0.32v2 + 4.48v - 7.68
B)h = -9/16 v2 + 63/8 v - 297/16
C)h = -1/2 v2 + 7v - 33/2
D)h = -v2 + 14v - 40





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