Answer: To find the unit rate that describes the number of gallons per dollar, we need to divide the number of gallons by the cost in dollars. In this case, we have:
Number of gallons = 5
Cost in dollars = $16.25
Dividing the number of gallons by the cost in dollars, we get:
Gallons per dollar = Number of gallons / Cost in dollars
= 5 / $16.25
= 0.3077...
Rounding to two decimal places, we get:
Gallons per dollar = 0.31
Therefore, the unit rate that describes the number of gallons per dollar is 0.31 gallons per dollar.
Explanation: