Health The following graph, which tracks the percentage of children under age 18 with some...

Health The following graph, which tracks the percentage of children under age 18 with some kind of food allergy over a period of 10 years, appeared on the Web site for the National Center for Health Statistics:

(a) What is the general trend for children less than 5 years old?

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(b) Let x = 7 correspond to 1997. Approximate a linear function to fit the data for the percentage of children less than 5 years old with food allergies, using 3.9% in 1997 and 4.7% in 2007.

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(c) If the trend continues, estimate the percentage of children less than 5 years old with food allergies in 2014.