11.6. A regional sales manager for a certain brand of electronics believes that the number of

home smart speakers that is sold in a week (y) for a store in his area depends on the average number of customers the store gets (x₁) and the number of other competitor brands within the store (x₂). He found the regression equation to bey= 2.92 + 0.058x₁ - 0.645x₂.

a. Interpret the slope for x₁.

b. A certain store recorded that it got 356 customers and had 4 competitor brands in stock.

What is the predicted number of home smart speakers that will be sold in the week?

c. A certain store recorded selling 28 speakers during a week that it got 356 customers and

had 4 competitor brands in stock. Compute the residual.

d. Interpret the residual in part c.