Question

What is the value of f(-1) when f(x)=2x+2

Answer 1

First plug in F(-1) into F(x)+2x+2
F(-1)=2(-1)+2

Solve

F(-1)= -1 + 2
F(-1)= 1

So when the function is -1, x equals 1

Answer 2

Plug (-1) into the x then you'll get 2(-1)+2 then you'll get 0 because -1 times 2 is -2 and -2 plus 2 equals 0