Twovariables, floor area(x1) and number of parking spaces(x2), are being used in the following interaction model to predict daily sales at a large supermarket chain.E(y) =1,482 + 0.7x1+ 10x2. What is the change inE(y) when x1 is changed from 3 to 4 and x2 is remains at5?

A.

8.6

B.

10.0

C.

0.7

D.

10.7

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