Chapter 2.3, Problem 42E

In Problems 41 and 42 proceed as in Example 6 to solve the given initial-value problem. Use a graphing utility to graph the continuous function y(x).

42. $\frac{dy}{dx}+P(x)y=0$, y(0) = 4, where

$P\left(x\right)=\{\begin{array}{l}1,\text{ 0}\le x\le 2\\ 5,x\text{ >2}\end{array}$