Question

The McMillan noticed that the amount of natural gas they use at their house each month is related to the average monthly temperature as shown .A. For each decrease of 10 degrees, the amount of gas used is about 25 therms less.B. For each increase of 10 degrees, the amount of gas used is about 25 therms less.C. For each decrease of 10 therms of gas used , temperature is about 25 degrees less. D. For each increase of 10 therms of gas used the temperature is about 25 degrees less.

Answer 1

Since the slope of the graph is -2.5, it means for every unitary increase in the average monthly temperature (unit in the x-axis), the amount of gas used will decrease by 2.5 units (unit in the y-axis).

That means for each increase of 10 degrees, the amount of gas used is about 25 therms less.

So the correct option is B.