In 2014, the average gas price in a certain state was $3.50 per gallon. In 2018, it dropped to $2.80 per gallon. Let x represent the year and y be the average gas price. Use the ordered pairs (2014, 3.50) and (2018, 2.80) to find the slope of the line that passes through these points. Interpret the slope in the context of this problem.

How much money does ron have left each month after his fixed expenses? ron graduated from college five years ago. he recently bought a house, but shares it with a housemate who pays him $800 a month for rent and utilities. ron is putting a budget worksheet together so he will have a better idea of where his money is going and where he can save. enlarge