ACTIVITY 3 Continued 1 Explain why Lina's and Michael's unit rates are different but still both correct. ( 14 ) 2 196 1 1 = 21.2 Spic 28.49 28, 94 There both corfect 28 . 49 - 28.49 = $0. 047 beacuse 142 # Oct $0 . 05 both equations are the same becaves the value of ? ( 14) 2-615 and 2 How would you use the unit rate to decide which pizza was the better buy using a Lina's method? What if you used Michael's method? sam 3 Which of the six sizes of pizza from Talarico's Pizza is the best buy? Explain your answer. Carnegie Learning, Inc.Talk - Activity ACTIVITY 3 Getting 3 the Talk Circles and Ratio -O TOPIC 1 LESSON 2 Unit Rates and Circle Area HABITS OF MIND . Reason abstractly and quantitatively. In this activity, you will use the area of circles to . Construct viable arguments and compare unit rates. critique the reasoning of others. 109 4 8 75 N Talarico's Pizza has a variety of pizza sizes. 7 = 14 1 = 18 Medium Large X-Large Enorme Ginorme Colossale Diameter 13 in. 16 in. 18 in. 24 in. 28 in. 36 in. Slices 8 10 1. 25 12 1. 1$20 . 9730 4040 Cost $9.99 $12.99 $14.99 $22.99 $28.99 $54.99 0 .5 O. 13 . 20. 94 - =0.9 12.49 = 1. 294 Lina and Michael are deciding which size pizza to buy. 30 a48233 LOL They ask themselves, "Which choice is the better buy?" REMEMBER... A unit rate is a ratio They each calculated a unit rate for the Ginorme pizza. of two different measures in which either the numerator or denominator is 1. > Analyze the Lina's and Michael's calculations. Lina TI ( 14 ) 2 _ 196 TL One Ginorme: 28.99 = 28.99 - 21.2 square inches per dollar The Ginorme gives you approximately 21.2 square inches of pizza per dollar. Carnegie Learning, Inc. Michael one Ginorme : 28.99 - 28.99 142 TT 196 TT = $0.047 per square inch The Ginorme costs approximately $0.0s for each square inch of pizza