If f(x) = 3x + 3, find f(-1).

Answer 1

To find f(−1) for the function f(x)=3x+3, substitute x=−1 into the function:

f(−1)=3(−1)+3f(−1)=3(−1)+3

f(−1)=−3+3f(−1)=−3+3

f(−1)=0f(−1)=0

Therefore, f(−1)=0f(−1)=0.

Answer 2

f(-1) = 3(-1) + 3 = 0