The scatter plot shows the amount of water in a tank as measured every few minutes. The initial amount of water in the tank was ___
gallons. The line of best fit shows that about ___
gallon(s) of water were lost per minute. The tank will be empty in about ___
minutes.

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)