Which of the following is always true of functions?
A) For each value in the range, there
is only one value in the domain.
B) For each value in the domain,
there is only one value in the
range.
C) The range of a function includes
all real numbers.
D) The domain of a function
includes all real numbers.

no idea

step-by-step explanation:

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