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?(1 point)
To find the rate of change in the cost of gas per gallon, we can calculate the slope of the line passing through the two points.
Slope (m) = (y2-y1) / (x2-x1)
m = (30-15) / (8-4)
m = 15 / 4
m = 3.75
Therefore, the rate of change in the cost of gas as each gallon is pumped is $3.75.