Graphing

Why use a graph? To Analyze Data Graphs are used to organize data Graphs are used to easily and quickly interpret data

Types of Data Qualitative- information that describes color, odor, shape or some physical characteristic Quantitative data- numerical information

Tables and Graphs Circle graph (pie chart) Bar graph Line graph Tables

What each graph needs 1. Determine a Title for the graph 2. Identify manipulated and responding variables 3. Determine the increments needed for the axes. Remember increments must be equal. 4. Create a key or label axes with units 5. Create the graph from data

Bar Graph Compares quantities and categories What is missing from this graph?

Bar Graphs

M & M’ s Create a data table to record color and numbers of each color of m & m’s. Identify the different colors of M & M’s and count the number of each color. Create a bar graph using space on your graph paper. Remember the things that every graph or chart needs.

Circle Graph (Pie Chart) Useful when percentages need to be represented Use a pie chart when representing parts of a whole (100%)

M & M ‘s Convert the data collected from your bar graph to percentages (part / total x 100) Construct a Pie Graph using the results of your calculations Include all parts of a graph

Line Graphs Compare relationships between two variables What are the 2 types of variables? On which axis is each located? Determine if the relationship is direct or inverse.

Line Graphs

M & M’s Count the total number of M & M’s and begin with an EVEN number Create a table to record time and number of M & M’s remaining Every 15 sec eat half of the M & M’s Remember to record how many M & M ‘s remain each time Continue eating the M & M’s until one remains Create a line graph using your time and number of M & M’s eaten.