1. Graphing

2. Why use graphs? Graphs provide a way to make information clear and meaningful. Different types of graphs include: Line graphs Bar graphs Pie charts

3. Line Graph

4. Bar Graph

5. Pie Chart

6. Graphing Rules 1. Each graph should be easy to read. 2. On each axis, equal intervals must represent equal changes. 3. The independent variable should be plotted on the horizontal axis. ( x -axis) 4. Make “Best Fit” lines. 5. Make the graph large enough to fit the entire page. 6. Label each axis with quantity and units. 7. The graph should make sense.

7. Reading the graph Interpolate: Read within my graph to obtain information. Extrapolate: Extend my graph to continue showing the relationship or pattern.

8. X Y Time (minutes) 0 D I S T A N C E (miles) 5101520 10 15 5 25 20 Road Trip

9. Graphing Directions Create a graph on the “Ball Toss” data. Be sure to: 1. Draw and label X and Y axis. 2. Write the quantity and units for each axis. 3. Give the graph a title. 4. Create equal intervals along each axis. 5. Plot the data points. 6. Connect the dots with a smooth, curved line.

10. Graphing Relationships Direct Relationship Inverse Relationship Cyclic Change No Relationship

11. Direct Relationship Y X As X increases, Y increases. Examples: a. Altitude of Sun and intensity of insolation. b. Igneous rock crystal size and cooling time.

12. Inverse Relationship Y X As X increases, Y decreases. Examples: a. Latitude and surface temperatures. b. Radioactive decay.

13. Cyclic Change Y X As X increases, Y increases and decreases and increases… Examples: a. Tides b. Seasonal daylight hours. Events that are cyclic are also PREDICTABLE!

14. No Relationship Y X There is no pattern between points on the graph. Examples: a. Day of week and temperature. b. Day of week and weather.

15. Constant Relationship Y X As X increases Y stays the same. Example: As volume increase the density will stay the same.

16. Exercise #11 Interpret each graph… On line a), describe the graph. Ex. As latitude increase, average surface temperature increases. On line b), state whether the graph is a direct relationship, inverse (indirect) relationship, cyclic change, constant, or no relationship. Latitude Surface Temp.