A function is described by the function notation f(x) = 2x' +1. Which shows a correct pairing of independent and dependent values for this function?
F ((1, 3), (0, 2), (3, 19), (-1, 3))
G ((3, 1), (9, 2), (19, 3), (2, -1)}
H {(2, 9), (0, 1), (3, 19), (-1,3)}
3 {(1, 3), (0, 2), (-2,7), (-1, 3}}

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%)