Final answer:
The correct unit rate for Jack's drive is c) (61/4) miles per gallon.
Step-by-step explanation:
The correct unit rate for Jack's drive is (61/4) miles per gallon. To find the unit rate, we divide the total distance traveled by the total amount of fuel used.
In this case, the total distance traveled is 61 miles and the total amount of fuel used is 4 gallons. So, dividing 61 by 4 gives us a unit rate of 15.25 miles per gallon.