Given f (x) = - x + 2, find f (-1)

f (x) = - x + 2

f (-1) This means that they want you to find the value of f (x) or y when x = - 1.

f (x) = - x + 2 Substitute/plug in - 1 into "x" since x = - 1

f (-1) = - (-1) + 2 (two negative signs cancel each other out and become positive)

f (-1) = 1 + 2

f (-1) = 3