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Question:

If Claire is 45 inches tall when she is 2 years old, what does the graph tell you about Claire concerning Sally?

A Claire is 15 inches taller than Sally at age 2.
Explaination

To solve this problem you would need to plot Claire’s growth during year 2 on the graph. Claire is 45 inches tall when she is 2, and Sally is, according to the graph, 30 inches tall when she is 2. Subtract 30 inches from 45 inches, and you come to the answer that Claire is 15 inches taller than Sally when they are 2 years old.