mathhhh help meeee

Question

Emie is recording her test grades based on the number of hours she spent studying for each test. The table shows the time she spent studying and the test grade she earned. 

 

Hours Spent Studying	Test Grade
0	34
2	50
4	66
6	82
8	98

 

What was the average rate of change of the test grade as the amount of hours she spent studying went from 0 hours to 8 hours?

Answer 1

each additional hour studying improved her grade 8 points

Grade = 8 times hours studied plus 34

G = 8H + 34 for 0<H<8.25

if she studied 8 hours and 15 minutes she'd get 100. She's wasting her time studying more than 8 1/4 hours.

G=8(8.25) + 34 = 10

G=8(8)+ 34 = 98

G=8(7)+34 =56+34 = 90

G=8(6)+34 = 48+34 = 82

G=8(5)+34 = 40+34 = 74

G=8(4)+34 = 32+34= 66

G=8(3)+34 = 24+34=58

G=8(2)+34 = 16+34 = 50

G=8(1)+34 = 8+34=42

G=8(0)+34 = 34