Question

If f(x) = x + 2, find f(3).

Answer 1

To caclulate f(3) when f(x) = x + 2 means: in x + 2, replace x with 3 and caclulate the result.

Answer 2

you would plug in 3 into the "y" which is f(x) , so you would get f(3)=3+2