-18. Graph the functions Y, = 0.6* and Y, = 0.3.4 on a graphing calculator.Use a viewing window from -5 to 5 for x and from –2 to 8 for y, witha scale of 1 for both. Sketch the curves.How does the graph of Y, compare with the graph of Y ? Discuss howthe graphs rise or fall and the y-intercepts.