Circle Graphs 6.2.1.2 Represent the relationship between two varying quantities with function rules, graphs an tables; translate between the two of these representations

I can… Self Assessment Create and interpret circle graphs 5- I can do it without help & teach others. 4- I can do this with no help, but I don’t know if I can explain it. 3- I can do this with a little help. 2- I can do this with a lot of help! 1- I don’t have a clue.

TERMS * The entire circle represents all of the data (out of 100) Circle Graph  graph that represents data as parts of a circle * The entire circle represents all of the data (out of 100)

Parts of a Circle Graph The Perfect Pizza Graph Title – the title tells what the graph is representing. Sectors – Each sector is one part of the whole circle. Sector Labels – Each label tells what the sector represents. The Perfect Pizza 55% cheese 15% sauce 30% pepperoni

Why circle graph/pie chart? The use of the circle graph/pie chart is quite popular, as the circle provides a visual concept of the whole (100%). Circle graphs/pie charts are also one of the most commonly used charts because they are simple to use.

Why circle graph/pie chart? A circle graph/pie chart uses percentages to compare information. Percentages are used because they are the easiest way to represent a whole. The whole is equal to 100%.

Constructing a circle graph A circle graph/pie chart is constructed by converting the share of each component into a percentage. In Figure 2, music preferences in 14- to 19-year-olds are clearly shown.

Reading a circle graph How many young adults prefer rap best? How many students prefer alternative music? What percentage of students prefer rock and roll? What type of music do young adults prefer least?

Using a Graph The circle graph shows the favorite frozen yogurt flavors of 100 students. About 300 students will attend the party. Predict how many students will ask for vanilla.

Using a Graph Find the relationship between the number of students surveyed and the number of students at the party. 100 • 3 = 300

Using a Graph Multiply the number of students who prefer vanilla by 3 to predict the number of students who will ask for vanilla at the party. 38 • 3 = 114

I can… Self Assessment Create and interpret circle graphs 5- I can do it without help & teach others. 4- I can do this with no help, but I don’t know if I can explain it. 3- I can do this with a little help. 2- I can do this with a lot of help! 1- I don’t have a clue.

in your math notebook Daily Check 2.7 For every 100 items, the graph shows the number and kind of music items that were shipped in one year. Of 500 music items, predict how many CDs were shipped. Out of 500 music items, predict how many were not CDs. How many music items out of 200 would you expect to be cassettes? If about 100,000,000 CDs were shipped in one year, how many will be shipped in 4 years?