Answer:
The correct answer is 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.
To get which is the correct answer , we try the same function for -x and x and we have to find the same answer. We are going to try with -5 and 5
A) f(x) = (x – 1)^2
f(5) = (5 – 1)^2 =16
f(-5) = (-5 – 1)^2 =36
Not even funtion
B) f(x) = 8x
f(-5) = 8 *-5 =-40
f(5) = 8*5 =40
Not even funtion
C) f(x) = x^2 – x
f(-5) = -5^2 – -5=30
f(5) = 5^2 – 5 =20
Not even funtion
D) f(x) = 7
f(-5) = 7
f(5) = 7
Even