5(2x - 3) = 15 plz help me plz

Which of the following graphs could represent a quartic function?

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%)

If the diagram polygon abcd is a reflection across ef to make polygon a'b'c'd'.