## What are Graphs Used For?

Graphs and charts are used to present data and facts in visual form. A graph is an easy way to compare numbers because it displays the relative sizes of numerical quantities.

## 3 Skills for Constructing a Graph

- Label the x-axis with the independent (manipulated) variable and the y-axis with the dependent (responding) variable.
- Determine an interval scale for each axis that is appropriate for the data to be graphed.
- Plot the data pairs as data points on the graph.

## Types of Graphs/Charts

## Pie Chart

Pie charts do now show patterns in change. They are best used when we want to show parts of a whole.