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Line graphs

A Line graph (chart) is a way to summarize series of quantities.

• The horizontal scale across the bottom and the vertical scale along the side provides information on how much or how many.
• The points on the graph show the facts.
• The lines connecting the points give estimates the values between the points.

The following line graph represents the value of Robert's baseball card collection.

1. How much has the value of Robert's collection increased from January to June? $10.00. 2. If this trend continues, what would be a reasonable estimate for the value of this collection in July?$132.50

The car salesman made a graph to show the number of cars he sold during the past few months

How many cars did he sold during April?

Solution: