CS 2 Review: Proportional Relationships Learning Target: I can complete rate tables, find unit rates, and write/graph equations for proportional relationships. Homework: Complete p. 4 and correct with EdPuzzle Video CS 2 Review Warm Up (packet p. 2): Which of these items is the better buy: a 40-pack of pencil-top erasers for $2.82 or a 2-pack of pencil-top erasers for $0.12? Show your thinking.

40-pack of erasers = 1-pack of erasers $2.82 $0.07 2-pack of erasers = 1-pack of erasers $0.12 $0.06

0.67 or 2/3 $1.50 0.67 or 2/3 of a dozen $1.50 $1.50 0.67 or 2/3 1.5 0.67

1.5 0.67 3.3 Cost ($) Dozens of apples 7.5 6 4.5 3 1.5 2.67 2 1.3 0.67 1 2 3 4 5 Dozens of apples 1 2 3 4 5 Cost ($)

6.25 $0.16 1 water bottle $0.16 6.25 water bottles $1 $0.16 water bottle 6.25 w. bottles $1 6.25 × c 0.16 × w

That point represents the unit rate 6.25 × c 0.16 × w Water bottles Cost ($) 31.3 25 18.8 12.5 6.25 0.8 0.64 0.48 0.32 0.16 1 2 3 4 5 Cost ($) 1 2 3 4 5 Water bottles That point represents the unit rate $1 buys 6.25 water bottles in the first graph 1 water bottle costs $0.16 in the second graph

Additional Time: Review Check Up 2 Start Homework on Page 4 (Complete and then correct with EdPuzzle)