Question

Which of the following is an even function?

A) f(x) = (x – 1)^2
B) f(x) = 8x
C) f(x) = x^2 – x
D) f(x) = 7

Answer 1

D) f(x) = 7

Explanation:

A function is even when f(-x) = f(x) for all x in the domain of f. We can say that the function is simetrical over x axis.

That's all i know, Hope it helps!