Frequency: How often something happens. 

Pictogram: is a way of showing data using images.

Bar Chart: is a graphical display of data using bars of different heights.

Pie Chart: A Pie chart is a special chart that uses sectors to show relative sizes of data.  

Line Graph: a graph that shows information connected in some way (usually as it changes over time).

Continuous Data: Quantitative data that has an infinite number of possible values within its range. Continuous data is measured.

Discrete Data: Quantitative or qualitative data that only takes certain values. Discrete data is counted.

Primary Data: Data that has been collected from the original source for a specific purpose. 

Secondary Data: Data that is not originally collected by a group for a specific purpose (e.g. using national statistics)