When you create a boxplot, the vertical variable must be scalar. If you supply panel variables, then the output will be split into different panes, with a set of boxplots for each panel.
You can only generate a histogram for one variable at a time using the histogram procedure.
The output is as expected, a histogram.
The Q-Q Plot can be used to check whether data comes from a particular distribution. The case where we will use this the most is with the normal distribution.
To be normally distributed, the data needs to follow the line on the Q-Q plot fairly closely.
Scatterplots can be useful with two scale level variables. Unfortunately, our dataset only has one, so I can't show you a meaningful scatterplot using that data.