Relationship charts are used to illustrate the relationship or correlation between two or more variables. They can also be used to show how one variable can have a positive affect, negative affect, or no effect on another variable.

.
USEFULNESS
.

• to illustrate the relationship or correlation between two or  more variables
• to demonstrate how something does or does not affect another variable positively or negatively
• to highlight the similarities across 2-3 variables and smaller data sets
• to identify outliers, trends, patterns, or averages in clusters of data

RELATIONSHIP BETWEEN
2 VARIABLES

---

SCATTER PLOT

RELATIONSHIP BETWEEN
3+ VARIABLES

---

BUBBLE PLOT

.
REAL LIFE EXAMPLES
.

• Estimate how marketing expenditures affect sales and profit.
• Spot flaws in effectiveness by evaluating expenses vs. income by store or region.
• Answer questions such as, “Does income level depend on IQ?” or “Do top tier business school graduates earn more in their careers?”