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) $ per gallon
To find the rate of change in the cost of gas as each gallon is pumped, we need to find the slope of the line that passes through the points (4,15) and (8,30).
The slope of a line is given by the formula: slope = (change in y)/(change in x).
In this case, the change in y is 30 - 15 = 15 and the change in x is 8 - 4 = 4.
So, the slope (rate of change) of the line is: slope = 15/4 = 3.75.
Therefore, the rate of change in the cost of gas as each gallon is pumped is $3.75 per gallon.