Data were collected on two variable x, and y and a least-square regression line were fitted...

Data were collected on two variable x, and y and a least-square regression line were fitted to the data. The resulting regression equation is

^y= 2.29-1.70x.

a. interpretation for the slope

b. calculate the residual for the point (5,6)

c. if the correlation between x and y is r= -0.32, what percentage of the variation in y is explained by the least-squares regression line based on x?

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