Which is true regarding the function?

f(–3) = 8
f(3) = 5
f(8) = 0
f(–6) = 10

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.