Graph of choice in
Drug level
Infant mortality rate
Mean annual income
Scatter diagram
This graph requires 2 variables
Scatter diagram
This graphs data points of a continuous variable according to categories of a second, categorical variable
Dot plot
Graph used to graph secular trends over long period of time
Rates over time
Line graph
Used to graph cases over a short period of observation
Epidemic
Histograms
Ideal for graphing frequency over 2 categorical variables
Grouped bar chart / stacked bar chart
Graph used for graphing frequency of categories of a single categorical variable such as breed of dog
Pie chart