In a 2010 survey of more than 200,000 freshmen at 279 colleges, only 52% rated their emoti...

In a 2010 survey of more than 200,000 freshmen at 279 colleges, only 52% rated their emotional health high or above average, a drop from 64% in 1985.

a. Find the slope of the line passing through the two points shown by the voice ballons.

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b. Use your answer from part (a) to complete this statement:

For each year from 1985 through 2010, the percentage of U.S. college freshmen rating their emotional health high or above average decreased by ___ The rate of change was ______ per