Regression analysis was applied between sales (y, in dollars) and advertising (x, in dollars) across all the branches of a major international corporation. The following regression function was obtained, y = 5000 + 7.25x. If the advertising budgets of two branches f corporation differ by 30,000, then what will be the predicted difference in their sales? a. 217,500 b. 222,500 c. 5,000 d. 7.25

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