Basic Data
Visualization
One Variable
Continuous
Categorical / Discrete
Histogram
Barplot
Two Variables
Explanatory: Categorical
Response: Categorical
Stacked barplot
Side-by-side barplot
Faceted barplot (usually preferred)
Explanatory: Categorical
Response: Numerical
Boxplot
Faceted histogram
Explanatory: Continuous
Response: Numerical
Multiple response values
per explanatory value
Single response value
per explanatory value
Scatterplot
Line-graph
Note that Explanatory corresponds to the Independent variable and Response corresponds to the Dependent variable.
Stacked proportional barplot