Watch those scales! The impression that a time plot gives depends on the scales you use on the two axes. If you stretch the vertical axis and compress the time axis, data appear to be more variable. Compressing the vertical axis and stretching the time axis make variations appear to be smaller. Make two time plots of the data in the previous exercise to illustrate this idea. Make one plot that makes variability appear to be larger and one plot that makes variability appear to be smaller. The moral of this exercise is: pay close attention to the scales when you look at a time plot.