Question

Part of the graph of the function f(x) = (x – 1)(x + 7) is shown below.

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

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 < –7 and where
x > 1.
The graph is negative on the interval x < –4.

Answer 1

vertex (-3,16)

increasing x > -3

The graph is positive only on the intervals x < -7 and x > 1.

Explanation:

The vertex is the minimum point.

The graph is going up at x > -3

The graph is above the x axis at x < -7 and x > 1

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