2.1 In a regression y = a + bx (where a and b are negative), if the value of variable x increases, what happens to variable y. Show your work. 2.2 In a regression y = a + bx (where a is negative and b is positive), if the value of variable x increases, what happens to variable y. Show your work. 2.3 In a regression y = 5 -4x, if the value of variable x increases by 1, what happens to variable y. Show your work.

In the figure above, we relate healthcare expenditures to income with the following regression in 2020: Expenditures = 20 + 1.5 Income 3.1 Based on the regression equation below, find the value of a and b in the 3.2 In 2024, the relationship between health expenditure and income has changed as follows. Expenditures = 25 + 3.5 Income A. Calculate health expenditures in 2020 and 2024 If income was $1. B. Determine the change (delta) in health expenditures for both 2020 and 2024 when income increases by 1 unit. Provide a detailed explanation and show your calculations

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