Find the slope on the line

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

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 can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation