A graph of the cost of gas purchased, depending on the number of gallons pumped has the points (4,15) and (8, 30) what is the rate of change in the cost of the gas as each gallon is pumped?

Answer 1

To find the rate of change in the cost of gas as each gallon is pumped, we need to calculate the slope of the line connecting the given points.

Let's label the number of gallons pumped as x and the cost of gas as y.

The given points are (4, 15) and (8, 30).

slope = (change in y) / (change in x) = (30-15) / (8-4) = 15/4

Therefore, the rate of change in the cost of gas as each gallon is pumped is 15/4 or 3.75.