Answer: See attached.
Explanation:
First, we will find the unit rate by dividing.
312 miles / 8 gallons = 39 miles per gallon
Then, we can fill out the other values using this unit rate.
39 miles / 39 miles per gallon = 1 gallon
3 gallons * 39 miles per gallon = 117 miles
Lastly, we will use these two equivalent ratios we found above to fill out the table and then plot the points. See attached.