Which equation relates y to x for the values in the table?
A) y =
1
2
· (
5
2
)x
B) y = 2 · (
3
4
)x
C) y =
3
4
x + 2
D) y =
7
2
x −
3
4

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%)