The Following Table Shows the Values of the Number of Gallons

Multiple Choice

The following table shows the values of the number of gallons of water used by a family during the month of July.
Find the linear regression equation based on the data provided to determine the number of gallons of water used on day 10. (Rounded to the nearest hundredth)

A) 12.50 gallons
B) 7.13 gallons
C) 13.66 gallons
D) 8.50 gallons
E) 11.01 gallons