How to Show Multiple Questions on the Same Chart

Requirements

A data set containing multiple variables that you want to show on the same chart.

From the toolbar, select Visualization and then select the type of chart that you want to create.
Click on the page to place the visualization.
From the object inspector on the left, go to Data > Data Source > Variables and select the first variable that you want to show.
Select the second variable to show using Data > Data Source > Variables.
Click Calculate.
OPTIONAL: Make further visual modifications via the additional Inputs and Chart options.