Answer:Test to determine if a function y=f(x) is even, odd or neither: Replace x with -x and compare the result to f(x). If f(-x) = f(x), the function is even. If f(-x) = - f(x), the function is odd.
The answer is A (a mountain climber descending a mountain.
This sis the answer because it is the only option with a decrease. When something decreases, a negative value (a number) represents the amount it decreased.
