152 per hour. Just take the 1672 and divide it by 11 to get your rate of change
Answer:
The car's average 18 number of miles per gallon
Step-by-step explanation:
The car has different efficiencies depending if its used on highway or city streets.
The efficiency on a highway is:

The efficiency for city driving is:

We now that the car uses twice as many gallons for city driving as for highway driving. This means that, for every gallon consumed, 2/3 are for city driving and 1/3 are for highway driving.
Then, we can calculate how many miles makes the car on average as:

A) (-3,-4)
b) -3
c) (0,-4)
d) mini = (-4,infinity)
e) (-1,0) and (-5,0)