Write the slope-intercept form of the equation of the line through the given the points. (0,3) and (-3,-3). Make sure your answer is in y=Mx+b form.

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%)