Find the equation of a line from the table. (use slope formula) A. y= 2x + 4
B. y= 3x - 4
C. y= 2x - 4
D. y= 3x + 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%)