Graphing Let’s Display the Data.

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Presentation transcript:

Graphing Let’s Display the Data

The Parts of a Graph The Independent variable The Dependent variable The Scale The Legend The Title

Independent Variable Independent variable belongs on the X axis of the graph (horizontal). It represents the data that can be directly controlled by you. Examples: time(length of the experiment), distance(depth of the water), temperature, etc.

Independent Variable

Dependent Variable This variable is placed on the Y axis (Vertical). 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 temperature, the activity of the enzyme will increase. The temperature is the independent variable while the enzyme’s activity is dependent upon it.

Dependent Variable

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.

The Scale

The Legend This part of the graph explains the values represented on the X and Y axis’. It is placed near the lower right area of the graph.

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: Enzyme Activity vs. Substrate Concentration

Example of a Completed Graph