The correct statement regarding the quadratic function f(x) = (x - 4)(x + 1) is given by:
It is increasing for x < -1 and x > 4.
When a quadratic function is increasing and when it is decreasing?
Considering a concave up quadratic function, with positive leading coefficient, we have that:
- It is increasing to the left of the lower root and to the right of the upper root.
- It is decreasing between the roots.
In this problem, the function is given by:
f(x) = (x - 4)(x + 1).
The roots are:
Hence the correct statement is:
It is increasing for x < -1 and x > 4.
More can be learned about quadratic functions at https://brainly.com/question/24737967
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