# Precalculus Examples

Step 1

Step 1.1

Cancel the common factor of and .

Step 1.1.1

Factor out of .

Step 1.1.2

Cancel the common factors.

Step 1.1.2.1

Factor out of .

Step 1.1.2.2

Cancel the common factor.

Step 1.1.2.3

Rewrite the expression.

Step 1.2

Combine and .

Step 2

Since the equation can be written in the form , varies directly with and . The constant of variation, , is .