Function Notation
Evaluating
Evaluating a function is the process of substituting a value for the independent variable and simplifying the resulting numerical expression.
Example 1
Consider the linear function f(x) = 3x - 4. Find f(2).
Step 1. Substitute the given value of 2 for x.
f (2) = 3(2) - 4
Step 2. Follow the Order of Operations to simplify.
3(2) - 4
6 - 4
2
f (2) = 2