Graphing Your Data Showing patterns trends A picture

Graphing Your Data Showing patterns & trends A picture is worth a thousand words! Regents Biology 2005 -2006

Types of data (information) § Variables u u what you measure in an experiment ________________ § ________________________: we don’t know how it will change until we do the experiment § ____________ The effect of u INDEPENDENT ______________________ on § ________________________: it only changes because we chose how it would change § ____________ Regents Biology DEPENDENT _______ 2005 -2006

Examples of experiments 1 § How does fertilizer affect the growth rate of plants? u we set up an experiment testing different amounts of fertilizer on different plants & measuring the growth (height) of the plants: § dependent variable (Y-axis)? w ____________ § independent variable (X-axis)? w ____________ Regents Biology The effect of _______ on _______ 2005 -2006

Examples of experiments 2 § How does exercise affect heart rate of 10 th grade student? u we set up an experiment testing different lengths of time of exercise (minutes) on the heart rate of students: § dependent variable (Y-axis)? w ____________ § independent variable (X-axis)? w ____________ Regents Biology The effect of _______ on _______ 2005 -2006

Examples of experiments 3 § What’s the favorite drink of students? u we set up an experiment surveying students and asking which is their favorite drink : § dependent variable (Y-axis)? w ____________ § independent variable (X-axis)? w ____________ Regents Biology The effect of _______ on _______ 2005 -2006

Making pictures out of data How’s a critter § Graphs to choose? u ______________ § graphing data that shows continuous change u ______________ § graphing data that is in disconnected groups Regents Biology 2005 -2006

temperature How does elevation affect temperature? 30 elevation (feet above sea level) temp. (°C) 25 0 30 500 25 1000 20 1500 15 2000 10 2500 5 20 15 10 1200 ft? 5 0 0 Regents Biology 500 1000 1500 elevation 2000 2500 2005 -2006

Which drink do you like best? number of students 6 5 4 drink number Coke 1 Pepsi 1 Water 4 Iced tea 4 Gatorade 3 3 2 Red Bull? 1 0 Coke Regents Biology Pepsi water type of drink tea Gatorade 2005 -2006

Any Questions? ? Regents Biology 2005 -2006