LESSON READ-THROUGH
by Dr. Carol JVF Burns (website creator)
Follow along with the highlighted text while you listen!

• PRACTICE (online exercises and printable worksheets)

DEFINITIONS:

A function $\,f\,$ increases on an interval $\,I\,$ if and only if whenever $\,a < b\,$ in $\,I\,$, $\,f(a) < f(b)\,$.
A function $\,f\,$ decreases on an interval $\,I\,$ if and only if whenever $\,a < b\,$ in $\,I\,$, $\,f(a) > f(b)\,$.

Roughly:
increasing means going strictly UPHILL, as you move from left to right on a graph
decreasing means going strictly DOWNHILL, as you move from left to right on a graph

On this exercise, you will not key in your answer. However, you can check to see if your answer is correct.

PROBLEM TYPES: 1 2 3 AVAILABLE MASTERED IN PROGRESS