Function Evaluation

HOW TO: EVALUATE A FUNCTION GIVEN ITS FORMULA

1. Replace the input variable in the formula with the value provided.
2. Calculate the result.

Example:

Given the function $h(p)=p^{2}+2p$, evaluate $h(4)$.

Solution

To evaluate $h(4)$, we substitute the value 4 for the input variable $p$ in the given function.

${\begin{aligned}h(p)&=p^{2}+2p\\h(4)&=(4)^{2}+2(4)\\&=16+8\\&=24\\\end{aligned}}$

Resources

• Evaluating Functions, Khan Academy
• Evaluating and Solving Functions, Lumen Learning