Tiana uses the equation c=21h to figure out the total amount, c, she should charge a customer for babysitting for h hours. a. What is the constant of proportionality? What does it mean?

b. Tiana charges $94.50 for a job. How long did she babysit for? Show your work.

A. 79.4B. 84C. Science class

Step-by-step explanation:

Average test score in math class

f(x) = 0.2x + 79

Average test score in science class

As per table the rate of change is -2, therefore g(x) is

g(x) = -2x + 88, becauseg(1) = -2 + 88 = 86

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

f(2) = 0.2*2 + 79 = 0.4 + 79 = 79.4

Part B: Determine the test average for your science class after completing test 2

g(2) = 84 given in the table

Part C: Which class had a higher average after completing test 4?  

f(4) = 0.2*4 + 79 = 0.8+ 79 = 79.8g(4) = -2*4 + 88 = - 8 + 88 = 80

Science class had higher class