posted by selina .
students in a biology class just took a final exam. a formula for predicting the average exam grade on a similar test t months later is.
(a)find the students average score when they first took the final exam.
(b)what would be the expected average score be on a retest after 4 months.
I know the answers I just am not sure how to work the problem to get them.
Please help me with the working of these problems.