Presentation on theme: "Thurso high school Graphs and Charts. Graphs A GRAPH (or Line Graph) connects a series of plotted points. The graph depicts trends or movement over a."— Presentation transcript:
Graphs A GRAPH (or Line Graph) connects a series of plotted points. The graph depicts trends or movement over a period of time. WHEN TO USE: To show trends or movements rather than amounts To Illustrate long series of data To compare series of data To predict trends or movement WHEN NOT TO USE: When the emphasis is on amounts When relative size or difference is required
BAR CHARTS A BAR CHART compares qualities or values which are not time related. WHEN TO USE: To compare the magnitude or size. To illustrate trends or movement WHEN NOT TO USE: Physical qualities such as size or weight work best vertically. Comparison of the magnitude of a number of items work best horizontally.
PIE CHARTS A PIE CHART is used to show relative values as a whole WHEN TO USE: To show approximate relative values of component parts of a whole. To compare component parts WHEN NOT TO USE: Charts with 7 or more components are usually confusing and difficult to interpret To show large numbers of components in a part. When the values of a number of component parts are small
PICTOGRAM Pictograms may be considered a type of BAR graph WHEN TO USE: When items by be represented by symbols or pictures. WHEN NOT TO USE: Values or sizes are represented by symbols or pictures directly related to the information being conveyed. When symbols or pictures are unclear or obscure.