The monthly cost of driving a car depends on the number of miles driven.Kate found that in May her driving cost was $380 for 480 miles and in June her cost was $460 for 800 miles.Assume that there is a linear relationship between the monthly cost of driving the car and the distance driven.

a.Determine the independent and dependent variables for this scenario.

Independent:Dependent:

b.Find the equation of the line (by hand) in slope intercept form that could be used to calculate the cost of driving the car x miles per month. (use Algebra- you must show your work).