A graph is a chart or drawing that shows the relationship between changing things. - They are a diagram displaying the relationship between numbers or amounts. - A graph is one of the easiest ways to compare numbers. - A graph or chart is used to present facts in visual form. - They are a drawing that displays the relative sizes of numerical quantities. - Graphs can be used to illustrate many types of data. - They should be used to make facts clearer and more understandable. - it shows trends over time. - Forceful -- Emphasizes main point - Convincing -- proves a point, see and hear - Compact way to convey information - More interesting than just talk or print - Quick way for the audience to visualize what you are saying -- numbers trends up or down - To bring facts to life - To show and compare relationships - To show and compare changes - They are much easier to understand then a large table of numbers - without the need to understand what each and every number in a table means. They help you visually see the difference between two or more values.