Which function represents the given graph?

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18

If you could answer these your a life saver

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i