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Unit 2 Ratio and Proportional Relationships

Unit 2 Ratio and Proportional Relationships. Lesson 5A Graphing 7.RP.2/ MP: 1-4 . Do Now. There are 9 red gumdrops, 10 yellow gumdrops, and 15 orange gumdrops in a bag. What is the ratio of orange gumdrops to red gumdrops in the bag? Is 3 12 a true proportion? 5 20

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Unit 2 Ratio and Proportional Relationships

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  1. Unit 2Ratio and Proportional Relationships Lesson 5A Graphing 7.RP.2/ MP: 1-4

  2. Do Now • There are 9 red gumdrops, 10 yellow gumdrops, and 15 orange gumdrops in a bag. What is the ratio of orange gumdrops to red gumdrops in the bag? • Is 312 a true proportion? 5 20 • Solve for x: 86 12 x = =

  3. Let’s Go Over Homework AnswersWB Pg 11 #20-27

  4. DO NOW • There are 9 red marbles, 5 yellow marbles, and 12 blue marbles in a bag. What is the ratio of blue marbles to red marbles in the bag? 2. Is 416 a true proportion? 5 20 3. Solve for x: 6 = 8 12 x

  5. Objective: • Students will graph relationships on a coordinate plane and determine if a relationship is proportional.

  6. (2, 3) (0, 0) y x Helpful Hint The sign of a number indicates which direction to move. Positive: up or right Negative: down or left Review: Graphing on a Coordinate Plane Quadrant I Quadrant II Y: move up 3 units X: move right 2 units (2, 3) (x, y) origin Quadrant IV Quadrant III

  7. Ms. Umstetter is planning a year-end pizza party for her students. • Cascarino’s Pizza is offering free delivery and charges $8 per medium pizza. • 1) complete the table to determine the cost for different numbers of pizzas ordered. • Pizza 1 • Cost ($) 8 16 • 2) Write the relationship of the cost and number of pizzas as a ratio in simplest form • 3) What do you notice about the simplified ratios? • 4) Graph the chart on a coordinate plane and connect the points. Describe the graph. • 5) Is the relationship proportional?

  8. Graph

  9. Notes • Another way to determine whether two quantities are proportional is to graph the quantities on the coordinate plane. • If the graph of the two quantities is a straight line through the origin, then the two quantities are proportional.

  10. CW: WB pg 17 • HW: Rates & Ratios 2 Wksht

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