https://www.coolmath.com/precalculus-review-calculus-intro/precalculus-algebra/24-the-difference-quotient-01
Precalculus Review Calculus Preview - Cool math . com - The Difference Quotient
This Precalculus review (Calculus preview) lesson reviews the difference quotient and gives an intro to how it is used in Calculus.
the difference quotientcool mathprecalculusreview