1. Advanced Math Topics 2.3 Circle Graphs (Pie Charts)

2. A rental car company rented out cars to consumers. The consumers had a choice of the make of vehicle. The types of cars selected are shown. Draw a circle graph of this data. Make# Rented Toyota310 GM480 Chrysler200 Ford115 Saturn85 German Companies 233 Other77 1,500 Steps 1) Find the relative frequency as a % for each category. % 310/1500 = 20.67% 32% 13.33% 7.67% 5.67% 15.53% 5.13% 2) Multiply the %(move the decimal twice to the left first) by 360 o to find the central angle of the category. Central Angle.2067(360) = 74 o 115 o 48 o 28 o 20 o 56 o 18 o 100% Or close 360 o Or Close 480/1500 =.32(360) = 3) Draw a circle, measure each central angle with a protractor. 4) Label each pie piece with the % and the description. Total

3. Make# Rented Toyota310 GM480 Chrysler200 Ford115 Saturn85 German Companies 233 Other77 Total 1,500 % 20.67% 32% 13.33% 7.67% 5.67% 15.53% 5.13% Central Angle 74 o 115 o 48 o 28 o 20 o 56 o 18 o 100% Or close 360 o Or Close. Toyota 20.67% GM 32% Chrysler 13.33% Ford 7.67% Saturn 5.67% German Co. 15.53% Other 5.13%

4. . Mexico 46.1% U.S. 29.7% South America 17.8% Canada 6.3% Saturn 5.67% It has been estimated that the number of billion of barrels of oil in the Western hemisphere, excluding Alaska, is given by this pie chart. Assuming that there are 130 billion barrels of oil in reserve, answer the following. 1) How many barrels are in reserve in the U.S.? 29.7% of 130 billion barrels.297(130 billion) = 38.61 billion barrels 2) How many barrels are in reserve in Canada and South America? 6.3% + 17.8% of 130 billion barrels = 24.1%. 241(130 billion) = 31.33 billion barrels

5. A few together from the HW P. 64 #8 and #9

6. Assignment 2B P. 63 #6-10