The graph of the function f(x) = (x – 4)(x + 1) is shown below. which statement about the function is true?

the function is increasing for all real values of x where
x < 0.
the function is increasing for all real values of x where
x < –1 and where x > 4.
the function is decreasing for all real values of x where
–1 < x < 4.
the function is decreasing for all real values of x where
x < 1.5.

which one is the correct answer