Unit Test — Unit test Answers — MHS

On a coordinate plane, a parabola opens down. It goes through (negative 2, negative 2), has a vertex at (1.5, 10), and goes through (5, negative 2).

(–∞, 1.5)

(–∞, 10.25)

(1.5, ∞)

(10.25, ∞)

Consider the quadratic function f(x)=8x2−7x+6. What is the constant of the function?

−7

Which function has two x-intercepts, one at (0, 0) and one at (4, 0)?

f(x) = x(x − 4)

f(x) = x(x + 4)

f(x) = (x − 4)(x − 4)

f(x) = (x + 4)(x + 4)

What is the y-intercept of the graph of the function f(x) = x2 + 3x + 5?

(0, –5)

(0, –3)

(0, 3)

(0, 5)

Which statements about the function are true? Select two options.

The vertex of the function is at (1,–25).

The vertex of the function is at (1,–24).

The graph is increasing only on the interval −4< x < 6.

The graph is positive only on one interval, where x < –4.

The graph is negative on the entire interval–4 < x < 6.

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