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# Graphing

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notes in physical science on graphing

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### Graphing

1. 1. Graphing
2. 2. I. What is a graph??? <ul><li>A. Graphs are “pictures” of information. They show information visually. </li></ul><ul><li>B. Graphs are also easier to read than charts! It is easy to tell by the graph which way a trend is moving. </li></ul>
3. 3. II. Types of Graphs <ul><li>A. Line graph – used to show trends, or changes over time </li></ul><ul><ul><li>1. Examples – stock market, your growth chart </li></ul></ul>
4. 4. II. Types of graphs (cont.) <ul><li>B. Bar graph – used to compare quantities in a given instant, more like a “snapshot” of what the numbers are </li></ul><ul><ul><li>1. Examples – boys vs. girls in a class </li></ul></ul>
5. 5. II. Types of graphs (cont.) <ul><li>C. Pie Graph – used to show percentages, or parts of a whole </li></ul><ul><ul><li>1. Example -- budget </li></ul></ul>
6. 6. III. Parts of a graph <ul><li>A. The x-axis & the y-axis </li></ul><ul><ul><li>1. The x-axis is always at the bottom </li></ul></ul><ul><ul><li>2. The y-axis is always on the upper left side (for the above type graphs) </li></ul></ul>
7. 7. III. Parts of a graph (cont.) <ul><li>1. Both the x & y axis must be labeled. Make sure to include the units of measurement on each axis. </li></ul>
8. 8. III. Parts of a graph (cont.) <ul><li>2. How to know which variable goes on which axis??? </li></ul><ul><li>M – manipulated </li></ul><ul><li>I -- independent </li></ul><ul><li>X – x-axis </li></ul>
9. 9. III. Parts of a graph (cont.) <ul><li>The “manipulated” variable is the same thing as the “independent” variable </li></ul><ul><li>MANIPULATED = INDEPENDENT </li></ul><ul><li>This is the variable YOU choose to change around! </li></ul>
10. 10. III. Parts of a graph (cont.) <ul><li>D – dependent </li></ul><ul><li>R – responding </li></ul><ul><li>Y – y-axis </li></ul>
11. 11. III. Parts of a graph (cont.) <ul><li>The “dependent” variable is the same thing as the “responding” variable </li></ul><ul><li>DEPENDENT = RESPONDING </li></ul><ul><li>This is the variable that you measure AFTER you’ve decided on the independent variable! </li></ul>