The linear function f(x)=0.2x+79 represents the average test score in your math class, where x is the number of the test taken. The linear function g(x) represents the average test score in your science class, where x is the number of the test taken.
Part A: Determine the test average for your math class after completing test 2.
Part B: The turnover test average for your science class after completing test 2.
Part C: which class had a higher average after completing test 4? Show work to support your answer.