Home/Geometry/Week 1: Equations and functions/Lesson 6

Evaluate functions

To evaluate a function, you substitute the given input value for the variable in the function's equation.

Lesson 6

Concept

**Example:** Given the function f(x) = 2x + 5, find f(3). 1. **Substitute:** Replace 'x' with 3. * f(3) = 2(3) + 5 2. **Solve:** * f(3) = 6 + 5 = 11

Try it

Practice: Evaluate functions.