Explain the steps taken to write an equation from a description given in words.

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

What is the reflection image of (5,-3) across the line y = -x?