What is the term for a graph that shows relationships between variables?

What is the term for a graph that shows relationships between variables?

• A. Histogram
• B. Line Graph
• C. Scattergram
• D. Bar Chart

Answer: (C)

When you want to show how two numerical variables relate to each other, you plot one on the horizontal axis and the other on the vertical axis, so you can see patterns, strength, and direction of their association. A scattergram is built exactly for this purpose, with each observation represented as a point on the plane. This setup makes it easy to spot whether the variables tend to increase together, move in opposite directions, or have no clear relationship at all, and it can reveal nonlinear patterns as well. A histogram, by contrast, portrays the distribution of a single variable’s values. A line graph emphasizes trends over time or across ordered categories by connecting data points with a line. A bar chart compares values across discrete categories, focusing on differences between groups rather than a relationship between two numeric variables.

When you want to show how two numerical variables relate to each other, you plot one on the horizontal axis and the other on the vertical axis, so you can see patterns, strength, and direction of their association. A scattergram is built exactly for this purpose, with each observation represented as a point on the plane. This setup makes it easy to spot whether the variables tend to increase together, move in opposite directions, or have no clear relationship at all, and it can reveal nonlinear patterns as well.

A histogram, by contrast, portrays the distribution of a single variable’s values. A line graph emphasizes trends over time or across ordered categories by connecting data points with a line. A bar chart compares values across discrete categories, focusing on differences between groups rather than a relationship between two numeric variables.