Workplace Math and PLAR Prep

Data Collection and Graphs

There are many different types of graphs. Each type has a unique characteristic and best use.

Line Graphs

Best used to track and display trends or changes over periods of time. Better than bar graphs for small intervals.

Pie Charts and Circle Graphs

Used to compare parts to a whole. Great to use when one or more parts makes up a substantial portion of the whole. Percentages are compared in pie charts.

Bar Graphs

Best used to compare data that is between different parties or groups. Can be used to track changes, but best used when the changes are drastic.

Area Graphs

Very similar to line graphs, but used to compare key data between two or more groups. This example shows two groups, but up to four groups is common.

X - Y Plots or Scattergrams

Used to determine if a relation or relationship belongs to different things. We look to see if they follow a trend. For example, does one go up when the other goes down?