Chapter 3, Problem 17P

Repeat problem P3-16 if

1. $P\left(x,y\right)=\left(4,2\right)\text{ in}\text{.}$ $P\left(x,y\right)=\left(-2,4\right)\text{ in}\text{.}$ $P\left(x,y\right)=\left(-5,-7.5\right)\text{ in}\text{.}$ $P\left(x,y\right)=\left(6,-6\right)\text{ in}\text{.}$