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 <
and where
x > 1.

The graph is negative on the interval x < 4.