I need help with question 3,4 According to a study, the relation between the ave

Question

I need help with question 3,4 According to a study, the relation between the average annual earnings of males and females with various levels of educational attainment can be modeled by the function F = 0.78 M - 1.313 where M and F represent the average annual earnings (In thousands of dollars) of males and females, respectively. (a) Viewing F as a function of M, what is the slope of the of this function? m = (b) Interpret the slope as a rate of change. For each $1 increase m male earnings, the female's earnings decrease by this much. For each $1 increase in male earnings, the female's earnings increases by this much. For each $1 increase in female earnings, the male's earnings decrease by this much. For each $1 increase in female earnings, the male's earnings increases by this much. (c) When the average annual earnings for males reach $70,00, what does the equation predict foe the average annual earnings for females? An electric utility company determines the monthly bill for a residential customer by adding an energy charge of 6.87 cents per kilowatt-hour to its base charge of $12.34 per month. Write an equation or the monthly charge y in terms of x, the number of kilowatt-hours used. (Let y be measured in dollars.)

Explanation / Answer

a) slope = m = 0.78

b) for each $1 increase in male earnings, the female's earnings increases by this much.

c) F = 0.78 x 70000 - 1.313 = $ 54598.687

2) y = (6.87/100)x + 12.34

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