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Info on Graphing Your Data

Info on Graphing Your Data. Showing patterns & trends. A picture is worth a thousand words !. Basics of Graphing. Variables – what you measure in an experiment: Dependent variable measured variable - we don ’ t know how it will change until we do the experiment

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Info on Graphing Your Data

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  1. Info on Graphing Your Data Showing patterns & trends A picture is worth a thousand words!

  2. Basics of Graphing • Variables – what you measure in an experiment: • Dependent variable • measured variable - we don’t know how it will change until we do the experiment • Plot it on the Y-axis (vertical axis) of the graph • Independent variable • manipulated variable - it only changes because we chose how it would change • X-axis (horizontal axis) of the graph The effect of ___Independent___on __Dependent__

  3. Examples of Experiments 1. How does fertilizer affect the growth rate of plants? • we set up an experiment testing different amounts of fertilizer on different plants & measuring the growth (height) of the plants. • dependent variable (Y-axis)? • height of plants • independent variable (X-axis)? • amount of fertilizer The effect of _____________on _____________ Amount of Fertilizer Height of Plants

  4. Another Example Experiment 2. How does exercise affect the heart rate of 10th grade students? we set up an experiment testing different lengths of time of exercise (minutes) on the heart rate of students: • dependent variable (Y-axis)? • heart rate • independent variable (X-axis)? • minutes of exercise The effect of _____________on _____________ Exercise Heart Rate

  5. Last Example! 3. What’s the favorite drink of students? Set up an experiment surveying students and asking which is their favorite drink : • dependent variable (Y-axis)? • number of students choosing drink • independent variable (X-axis)? • type of drink The effect of _____________on _____________ Type of Drink How many students chose it

  6. Graphing the Data Types of Graphs: • line graphs • graphing data that shows continuous change • bar graphs (or histograms) • graphing data that is in disconnected groups

  7. 10 20 30 15 25 0 5 0 1500 1000 2500 2000 500 1200 The Effect of Temperature on Elevation Line graph! 18 temperature 1200 ft? elevation

  8. 0 2 4 6 1 3 5 Gatorade Pepsi water Coke tea Drink Preferences of Students Bar graph! number of students type of drink

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