These two are from class: #3 & #6.

This is another #6 with requested red numbers and #5.

This is #2. The problem has a graph that looks like a piece of a cubic function with two points marked. The only part that matters is the two points. The net change is the difference in the *y*-values. The average rate of change is the difference in the *y*-values divided by the difference in the *x*-values, just like the slope of a line. Remember that both are signed values: moving from lesser *x* to greater.