Question

Todd had 6 gallons of gasoline in his motorbike. After driving 150​ miles, he had 3 gallons left. Compute the​ slope, or rate of change in the amount of gasoline.

Answer 1

So for every gallon he can drive 50 miles. So I think  the slope would be 50/-1

Answer 2

Give that,

Todd had 6 gallons of gasoline in his motorbike.After driving 150​ miles, he had 3 gallons left.

When Todd had 6 gallons of gasoline in his motorbike he drived 0 miles,

And When he had 3 gallons left , he had drived 150 miles.

Slope or rate of change =
`(3-6)/(150-0) =(-3)/(150) =-(1)/(50) = - 0.02`

Slope or rate of change of gasoline is negative which means gasoline is decreasing with increase in miles.

Slope or rate of change of gasoline= - 0.02 gallons/mile