The graph of the function f(x) = (x - 4)(x + 1) is shown
below.
Which statement about the function is true?
6
+
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 The function is decreasing for all real values of x where
x < 1.5.
-6
4-
A
6
x
bb

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function

the answer is  

d.

21

i did this one. so you should get it right.