### Home > INT1 > Chapter 4 > Lesson 4.1.2 > Problem4-19

4-19.

If $f(a) = 16$, calculate the following values, if possible.

1. $f ( a ) - 2$

• Substitute $16$ in for $f(a)$ and evaluate.

1. $f ( 2 a )$

• This is a constant function, so not matter what the input is, the output is always $16$.

1. $3 f ( a ) + 2$

• $3(16) + 2$