Here's another line graph for you to inspect.

This chart shows the total number of pushups done by members of a fitness
club during a single week.
Using this chart we can answer questions like:
1) How many pushups did club members do on Friday?
ANSWER: 400
2) On what day did club members do the most pushups?
ANSWER: Tuesday
3) What was the total number of pushups done for the week?
ANSWER: 200 + 700 + 800 + 200 + 300 + 400 + 600 = 3200