Jeffrey and Liz are each saving money for college. Their savings are shown in the graph at right.
Based on the graph, who is saving money fastest? Justify your answer.
A steeper slope means that more money is being saved for a given time period.
Who has the line with the steeper slope?
Estimate the slope of each line. What does the slope tell you about this situation?
Find the change in
and divide by the change in for each line.
The slope is the rate at which each person saved money.