The linear function f(x) equals 0.4 X +81 represents the average test score in your language arts class where ask is the number of the test taken 

The linear function f(x) equals 0.4 X +81 represents the average test score in your language arts class were asked is the number of the test taken. The linear function g(x) represents the average test score in your social studies class where X is the number of test taken.

x g(x)
1 84
2 82
3 80

Part A: Determine the test average for your language arts class after completing test 2.

Part B: determine the test average for your social studies class after completing test 2.

Part C: which class had a higher average after completing test 4.