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**Collect and Analyze Data (GRAPHING)**

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**What should be on every graph?**

THREE TITLES! overall title at the top of your graph describing what your graph is about x-axis title (bottom line) describing what information you test. Y-axis title (vertical line) describing what information you put

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Title Y-AXIS X- AXIS

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**X-axis (horizontal, bottom line)**

Your INDEPENDENT VARIABLES go along your x-axis. List each independent variable along the bottom Don’t forget to put a title along the x-axis after you have listed your independent variables

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Independent variable

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**Y-axis (vertical line)**

Your DEPENDENT VARIABLE goes along the vertical y-axis. You must look at your data to come up with an appropriate scale. The scale is what you count up by along the y-axis. Example: count up by 1’s, count up by 2’s, count up by 10’s, etc. Always start with zero in the bottom corner.

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Dependent variable

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**Variables: are factors we can control, measure, or manipulate in an experiment Types of Variables: **

What is a Variable???? Independent Variable: *one we manipulate and can change EX. Colors, Days, Months, Cities Dependent Variable: *the one that we measure or observe EX. Temperature, # of shark attacks Control *the one that DOES not change EX. Time we take temp, what tool we use, kind of flower pots

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Dependent Variable Possible Control Variables: *where you get data *when you take data Independent Variable

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Bar graph & Line graph You will make a bar graph if you are comparing 2 or more things. You will make a line graph if you are tracking something changing over a period of time.

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**Practice bar graph Favorite Sport # of students Basketball 45 Football**

36 Baseball 18 Softball 11 Other 25

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2014 Sports Particiaption

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Practice Line graph Year # of bears 1995 30 2000 25 2005 17 2010 12

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**# of Bears Spotted in State Parks**

Years

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**Types of Graphs Bar Graphs Circle Graphs 3 major types of Graphs:**

Line Graphs 3. Circle Graphs Bar Graphs 1. Categorical data 2. Vertical and horizontal bars 3. Show amounts of each category Most common in science* Shows change over time Shows how one variable changes in response to another Shows trends of data Circle Graphs Categorical data Shows relationship of part to the whole Must have data for all categories Also called a pie chart

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Graphing. Line Graphs Shows a relationship where the dependent variable changes due to a change in the independent variable Can have more than one.

Graphing. Line Graphs Shows a relationship where the dependent variable changes due to a change in the independent variable Can have more than one.

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