Multiple Scatter Plots for HW VII / #1.

[Taeho Kim]

If you want to stack the scatter plots, then use the following command:
par(mfrow=c(2,2))
before you run the codes for the plots
It will provide you the 2 by 2 output.

If you want to escape from this output setting, then
simply tap the "broom" icon on the plot panel of R-Studio.
If will remove the plots and revert to the initial setting.