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