The equation y=−0.0088x2+0.79x+15 models the speed x (in miles per hour) and average gas mileage y (in miles per gallon) for a vehicle. What is the best approximate for the average gas mileage at a speed of 60 miles per hour?
Accepted Solution
A:
Answer: 30.72 miles per gallon
To find best approximate for the average gas mileage at a speed of 60 miles per hour you need to replace the variable x with 60. The calculation would be: