2.  Line (a lot of data, often involving time) › Used when there may be a trend or pattern  Age versus Height  Bar (counting) › Used for somewhat unrelated items  Number of Dog, Cats and Fish as pets  Pie (if a total is involved) › Used to show how one thing is part of a whole thing  Percent of votes in an election  (Part/Whole) * 100%

4.  Independent Variable › What the scientist picks › What the scientist can control  Type of droppers, I could have used a turkey baster or snot sucker  Dependant Variable › The result of the independent variable  The number of drops DEPENDED of which dropper we used

5.  Scale › MUST be equal  EVERY line MUST mean something  2, 4, 5, 1.2 Doesn’t matter as long as you keep it the same  Can be altered ONCE using a ‘break’ across the axis  The break is usually a diagonal equal sign or a heartbeat (see examples above)  ONLY used if there is a LARGE gap in ALL the data › To Find your scale Figure out how much data you have then, count the amount of space you have and divide:  Example: 39 drops of water was the most so go to 40  I have 11 lines to fit it on my graph  40 ÷ 11 = 3.64 If I go by 3.8 or 4 it will fit well

6.  Line Graphs follow the same basic rules as bar graphs.  Can have multiple lines.  Line doesn’t always have to start at zero.

7.  Pie Graphs › Data is shown as a percent of a whole.  To Calculate Percent › Find the part you want › Divide it by the total › Take that answer and multiply it by 100

9.  Calculation Example: › 68 people voted › Marcia got 25 votes › Sam got 31 votes and › Ian got the rest