Aim: Graphing Your Data Enter Date Aim: Graphing Your Data Warm-up: How much water should be removed from the graduated cylinder leave 5 mL of water in the cylinder? HW:

Types of Data (information) Variable: what you measure in an experiment A) INDEPENDENT VARIABLE - manipulated variable - Predictable change: I change it factor - X-axis B) DEPENDENT VARIABLE - measured variable - Unpredictable change: What gets changed - Y-axis

How does fertilizer affect the growth rate of plants? Example Experiment #1 How does fertilizer affect the growth rate of plants? We set up an experiment testing different amts of fertilizer on different plants & measuring the growth (height) of the plants: Amount of fertilizer Independent: ________________ Height of plants Dependent: ________________

How does exercise affect heart rate of 10th grade students? Example Experiment #2 How does exercise affect 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: Minutes of exercise Independent: ________________ Heart rate Dependent: ________________

What’s the favorite drink of students? Example Experiment #3 What’s the favorite drink of students? We set up an experiment surveying students & asking which is their favorite drink: Type of Drink Independent: ________________ Number of Students Dependent: ________________

Making pictures out of DATA LINE GRAPHS -Graphing data that shows continuous change BAR GRAPHS (or histograms) -Graphing data that is not directly connected

18 1200 Temperature Elevation Elevation (ft above level) Temp (°C) 30 30 500 25 1000 20 1500 15 2000 10 2500 5 18 Temperature 1200 Elevation

Drink Number Coke 1 Pepsi Water 4 Iced tea Gatorade 3

6 Steps to Making PERFECT LINE GRAPH 1. Identify the Independent & Dependent Variables DEPENDENT INDEPENDENT

The growth of humans by their age. 2. Label axes with UNITS The growth of humans by their age. (INCHES) GROWTH AGES (YEARS)

-Numbers must be EVENLY SPACED 3. Determine the Scale of Graph 0 5 10 15 20 25 0 5 9 10 12 14 -Numbers must be EVENLY SPACED

4. S P R E A D out data 0 5 10 15 20 25 0 5 10 15 20 25

Temperature (°C) Depth (meters) 5. DO NOT CONNECT to ZERO, ZERO unless on data table Depth (meters) Temperature (°C) Depth (meters) 5 10 20 15 30 35 25 40 Temperature (°C)

How does fertilizer affects height of plants? 6. TITLE Question or statement that describes the experiment How does fertilizer affects height of plants? Height Fertilizer

NEVER USE VS

The Temperature of the water as you increase in depth Temperature (C) Depth (meters)