# Graphing Let’s Display the Data TYPES OF GRAPHS Bar Graph Pie Graph Line Graph AKA “Cartesian”

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Slide 2 Graphing Lets Display the Data Slide 3 TYPES OF GRAPHS Bar Graph Pie Graph Line Graph AKA Cartesian Slide 4 Bar Graphs USE BARS TO SHOW DATA! Slide 5 Pie Graphs USE CIRCLES TO SHOW DATA Sorry, no pies. Slide 6 Line Graphs Used in Math, Science, and Business. PAY ATTENTION! Slide 7 The Parts of a Graph The Independent variable (X-axis) The Dependent variable (Y-axis) The Scale (The space between marks) The Legend (Explains symbols) The Title (What the Graph is about) Slide 8 Independent Variable Independent variable belongs on the X axis of the graph (Horizontal: Left & Right). It represents the data that can be directly controlled by you. Examples: time(length of the experiment), distance(depth of the water), temperature, number of Takis eaten, etc. Slide 9 Independent Variable Slide 10 Dependent Variable Placed on the Y-axis (Vertical: Up and Down). This variable depends upon the independent variable. Whatever happens to the independent variable the dependent variable should react to it. Example: If we increase the number of Takis eaten, the activity of your gag reflex increases. Slide 11 Dependent Variable Slide 12 The Scale The scale represents the range of values that applies to each variable. The scale must contain all the data values for each variable and must be arranged on the graph using multiples to insure equal distribution: 2X, 5X, etc. The scale must occupy at least 3/4ths of the axis length. Slide 13 The Scale Slide 14 The Legend This part of the graph explains the values represented on the X and Y axis. It is usually placed near the lower right area of the graph. Slide 15 Slide 16 The Title The title should be a short statement representing what is found on the graph. It usually contains the independent and dependent variables. Example: Average Number of Takis Eaten Before People Gag. Slide 17 Slide 18 Example of a Completed Graph ##### 2.1 Graphing Linear ... Section 2.1 Graphing Linear Equations 45 EXAMPLE 2 Graphing a Horizontal Line and a Vertical Line a. Graph y = −3.b. Graph x = 2. The graph of y = −3 is
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