Cross tables and scatterplots are used to represent relations between more than one variables.
We use Cross tables for categorical variables and scatter plots for numerical variables.
Cross Tables
| Type of investment \ Investor | Investor A | Investor B | Investor C | Total |
| Stocks | 96 | 185 | 39 | 320 |
| Bonds | 181 | 3 | 29 | 213 |
| Real Estate | 88 | 152 | 142 | 382 |
| Total | 365 | 340 | 210 | 915 |
Visualizing cross table with a side-by-side bar chart:
This way, we can easily compare asset holding for a specific investor or among investors.
Scatter Plot
Scatter plot of SAT scores of students in reading and writing below.
Outliers are data points that go against the logic of the whole dataset.