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Graphing The Important Elements of a Graph Horizontal Axis (X-Axis) The Independent Variable. A change in this variable affects the y variable. Vertical Axis (Y-Axis) The Dependent Variable. This variable is dependent on change in x variable Title Should explain the goal of the graph and what it measures. Legend Should explain what is being measured and the values Scale The scale of the numbers is important to accurately interpreting the graph. TYPES OF GRAPHS LINE GRAPH BAR GRAPH PIE CHART SCATTER PLOT Line Graph The most common type of graph. Points connected by a line to make a visual pattern over time. This pattern is used to evaluate trends. Bar Graph Often used when portions of a whole are being represented. Often used when representing percentage. Works well to compare information across individuals, settings, or situations. Pie Chart Useful in representing portions of a whole. Useful in representing percentages Scatter Plot Used when a variety of measurements are taken consecutively. Each point is independent. Can see how one point compares with others.