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Understanding Graphing: Patterns, Trends, and Experimental Variables

This guide explores the importance of graphing data to reveal patterns and trends in experimental results. It covers key concepts such as independent and dependent variables, types of data, and practical examples of experiments—like how fertilizer impacts plant growth and how exercise affects heart rates. By employing visual representations like graphs, we can effectively communicate findings and make data-driven decisions. The document is designed to help students understand essential graphing techniques in various scientific contexts.

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Understanding Graphing: Patterns, Trends, and Experimental Variables

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

  2. Types of data (information) • Variables • what you measure in an experiment • _______________________________ • ________________________ • ________________________: we don’t know how it will change until we do the experiment • ________________________ • _______________________________ • ________________________ • ________________________: it only changes because we chose how it would change • ________________________ The effect of _____________on _____________ INDEPENDENT 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)? • ________________________ • independent variable (X-axis)? • ________________________ The effect of _____________on _____________

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

  5. Examples of experiments 3 • What’s the favorite drink of students? • we set up an experiment surveying students and asking which is their favorite drink : • dependent variable (Y-axis)? • ________________________ • independent variable (X-axis)? • ________________________ The effect of _____________on _____________

  6. Making pictures out of data How’s a critterto choose? • Graphs • ___________________________ • graphing data that shows continuous change • ___________________________ • graphing data that is in disconnected groups

  7. 30 10 20 15 25 0 5 0 1500 2500 1000 2000 500 How does elevation affect temperature? temperature 1200 ft? elevation

  8. 0 2 4 6 1 3 5 Gatorade Pepsi water Coke tea Which drink do you like best? number of students Red Bull? type of drink

  9. Any Questions??

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