bar charts

• summarises the frequency of categorical/nominal data, data is in distinct categories, the categorical variable blongs on the horizontal x axis, and the frequency is on the y axis, the height of each bar is the frequency
• the bars do not touch- as the bars in a bar chart shows categorical data, not continuous data, this is made clear by making sure each bar does not touch, if the bars touch, the graph is no longer a bar chart but a histogram
• data divided into categories, discrete data, everyone is only in 1 category
• how to construct- clear title, equal intervals, bars not touching- not continuous data like a histogram is,