# Reciprocal (Graph)

The graph of an equation where the x term is a denominator of a fraction.

# Compound Bar Chart

A bar chart where the categories are stacked on top of each other. This allows for the visualisation of the proportion of each category each represents. Usually used when comparing two or more sets of data. A key is needed to interpret the data.

# Dual Bar Chart

A bar chart where each category has two bars instead of one. This is used when two frequencies exist for a category. This type of graph allows for comparisons to be made between the two sets of values.

# Line Graph

A graph of points, connected by a line, to show how something changes in respect to time or another value.

# Modal Class

The group with this highest frequency.

# Grouped Tally Chart

A tally chart which records data in groups rather than distinct values. May be used when individual values would have no or little data recorded.

# Class

Another way of saying group.

# Group

How a set of data may be linked together.

# Tally Chart

A table used to record frequencies. Uses tally marks to show frequency. Data is grouped into bundles of 5.

# Bar-Line Chart

A diagram that uses lines to represent frequencies. The longer/taller the line the higher the frequency. Only used for discrete data, so equal gaps must be between the lines.