Unit Test Answers

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What are the solutions to m2 – 9 = 0?

m = –9 and m = 0

m = –3 and m = 3

m = –3

m = 9

three

The vertex of the function is at (–4,–15).

The vertex of the function is at (–3,–16).

The graph is increasing on the interval x > –3.

The graph is positive only on the intervals where x 1.

The graph is negative on the interval x < –4.

Which function has a vertex on the y-axis?

f(x) = (x – 2)2

f(x) = x(x + 2)

f(x) = (x – 2)(x + 2)

f(x) = (x + 1)(x – 2)

Gerald graphs the function f(x) = (x – 3)2 – 1. Which statements are true about the graph? Select three options.

The domain is {x| x ≥ 3}.

The range is {y| y ≥ –1}.

The function decreases over the interval (–∞, 3).

The axis of symmetry is x = –1.

The vertex is (3, –1).

What is the y-value of the vertex of the function f(x)=−(x+8)(x−14)?

112

121

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