Of two personnel evaluation techniques available, the first requires a two-hour test interview while the second can be completed in less than an hour. The scores for each of the 15 individuals who took both tests are given in the next table.

a. Construct a scatterplot for the data. Does the assumption of linearity appear to be reasonable?
b. Find the least-squares line for the data.
c. Use the regression line to predict the score on the second test for an applicant who scored 85 on Test 1.

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