AIM: What is a circle graph? Ability to customize a circle graph independently based upon scientific data DEFINITION: •a CIRCLE GRAPH is a diagram which represents varying sections of DATA •The DATA VALUES are expressed as a percentage •diagramed as a circle. Example: Who eats the Pizza at Mr. Z’s • How many slice are in a pizza? 8 • What Percentage of the total is 4 slices 50% • What percentage of the total is 2 slices 25% • What percentage of the total is 1 slice? 12.5% Example: Who eats the Pizza at Mr. Z’s • Mr Z eats 4 slices. What percentage of the total pie is that? 50% • Mrs. Z eats 2 slices what percentage of the total pies is that? 25% • Alex eats one slice. • Andie eats one slice. 12.5% 12.5% Example: Who eats the Pizza at Mr. Z’s Andie 12.5% Mr. Z 50% Alex 12.5% Mrs. Z 25% Example: How much Pizza? Jon has 4 slices, Bill has 3, Sue has 1 Person Slice % 4/8 50% Jon 4 = Bill 3 = 3/8 37.5% Sue 1 = 1/8 12.5% TOTAL 8 Example: How much Pizza? Jon has 4 slices, Bill has 3, Sue has 1 Sue 12.5% Jon 50% Bill 37.5% • Tips for Circle Graphs? •Organize your data into a table FIRST! •Figure about how many total sections of the “pie” there must be for your graph • Tips for Circle Graphs? •Start at the center of the circle and draw your lines outward to the circumference •Try to label each piece of the wedge in the wedge first. Draw a line if it does not fit •Circle graphs need to have percentages! •Don’t forget to Title your graph! CLASS EXAMPLE Suppose you watched TV all day. You saw 35 toy commercials, 25 cereal commercials, 25 fast food commercials, and 15 commercials for other products What do you do first? •Step One: Put your Data in a Table Number of Commercials Type of Product Number of Adds Toys 35 Breakfast Food 25 Fast Food 25 Other products 15 •Step Two: Calculate the total number of TV commercials in your study •35 + 25 + 25 + 15 = 100 Total Units •100 Total Commercials in all categories •Step Three: Calculate the percentage of each section to the total number of units •Toys 35/100 35% •Breakfast Foods 25/100 25% •Fast Foods 25/100 25% •Other 15/100 15% Kinds of Adds on Children’s TV Shows Fast Food 25% Toys 35% Breakfast Food 25% Other 15% Knap-Sack Brand Brand Number of Boys NIKE 20 FUBU 40 Polo 35 TARGET 15 Knap-Sack Brand Brand Number of Boys NIKE 20 20/110 * 100=18% FUBU 40 40/110 * 100 = 36% Polo 35 35/110 * 100 = 32% TARGET 15 15/110 * 100 = 14% Knap-sack brand vs Students 10% 19% Nike Fubu Polo Target 33% 38% A Team Population Year Number 2004 110 2003 105 2002 85 2001 101 A Team Population Year Number 2004 110 110/401 X 100 = 27.4% 2003 105 105/401 X 100 = 26.1% 2002 85 85/401 X 100 = 21.3% 2001 101 101/401 X 100 = 25.2% Years vs. Number of Students 25% 28% 2004 2003 2002 2001 21% 26% Sports Participation by Sex Sport Number of Boys Number of Girls Soccer 25 20 Baseball 20 30 Basketball 15 15 Tennis 8 16 Sports Participation by Sex Sport Soccer Number Number Total Boys Girls 45 25 20 Baseball 20 30 50 Basketball 15 15 30 Tennis 16 24 8 149 Sports Participation by Sex Sport Soccer Number Number Total Boys Girls 45/149 * 100 = 30% 25 20 Baseball 20 30 50/149 * 100 = 34% Basketball 15 15 30/149 * 100 = 20% Tennis 16 24/149 * 100 = 16% 8 149 Total Sports Participation tennis 16% soccer 30% basketball 20% baseball 34% NMS Fundrasing Activity Receipts Expense Car wash 100 60 Breakfast 150 50 Bake Sale 125 25 Raffle 100 200 NMS Fundrasing Activity Receipts Expense Profit Car wash 100 60 40 Breakfast 150 50 100 Bake Sale 125 25 Raffle 100 200 100 100 340 NMS Fundrasing Activity Receipts Expense Profit Car wash 100 60 40/340 * 100 = 12% Breakfast 150 50 100/340 * 100 = 29% Bake Sale 125 25 Raffle 100 200 100/340 * 100 = 29% 100/340 * 100 = 30% 340 Profit from Each Event Raffle 29% Car Wash 12% Pancake 30% Bake Sale 29% NMS Absences Day 6th grade 7th 8th Tuesday 5 10 6 Wednesday 7 10 6 Thursday 6 6 6 NMS Absences Day 6th 7th 8th Total Tuesday 5 10 6 21 Wednesda 7 y Thursday 6 10 6 23 6 6 18 62 NMS Absences Day 6th 7th 8th Total Tuesday 5 10 6 21/62 * 100 = 34% Wednesda 7 y Thursday 6 10 6 23/62 * 100 = 37% 6 6 18/62 * 100 = 29% 62 Day vs Total Absences 0% 29% 34% 6th 7th 8th 37% AIM: What is a Circle Graph? Class ACTIVITY: Middle School Circle Graph page 70 (next page) Homework: INTERNET QUESTIONS