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 passing through the points (4, 15) and (8, 30).
The formula for calculating the slope of a line passing through two points (x1, y1) and (x2, y2) is:
slope = (y2 - y1) / (x2 - x1)
Using the points (4, 15) and (8, 30):
slope = (30 - 15) / (8 - 4)
slope = 15 / 4
slope = 3.75
Therefore, the rate of change in the cost of gas as each gallon is pumped is $3.75 per gallon.
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?
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