Describe how compressions and expansions of functions affect graphs and their related equations:
− y = af(x)
– y = f(kx)
Perform, analyse, and describe a horizontal stretch about the y-axis (y = f (kx), where k > 0) or a vertical stretch about the x-axis (y = af (x), where a > 0) graphically given the function y = f (x) in graphical form
