Please help! I am struggling with this concept!

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.