Lesson Topic: From Ratio Tables to Double Number Lines

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Solving Ratio Problems using Ratio Tables

Graphing Equivalent Ratios

Presentation transcript:

Lesson Topic: From Ratio Tables to Double Number Lines Lesson Objective: I can… Create equivalent ratios using a ratio table and represent these ratios on a double number line.

Exercise 1: Class Activity with ratios. Write a ratio on a white board. Give your white board to someone in the room. They need to write and equivalent ratio. Keep switching until you have 5 equivalent ratios.

Exercise 2: The amount of sugary beverages Americans consume is a leading health concern. For a given brand of cola, a 12-ounce serving of cola contains about 40 grams of sugar. Complete the ratio table, using the given ratio to find equivalent ratios. Cola (ounces) Sugar (grams)

Exercise 3: A 1-liter bottle of cola contains approximately 34 fluid ounces. How many grams of sugar would be in a 1-liter bottle of the cola? Explain and show how you arrived at your solution. Cola (ounces) Sugar (grams)

Example 1: Students will use a double number line to record the table from exercise 1.

Exercise 4: A school cafeteria has a restriction on the amount of sugary drinks available to students. Drinks may not have more than 25 grams of sugar. Based on this restriction, what is the largest size cola (in ounces) the cafeteria can offer to students? * Create a double number line to show your work.

Exercise 5: Shontelle solves three math problems in four minutes. Complete a table to show this information. Shontelle has soccer practice on Thursday evening. She has a half hour before practice to work on her math homework and to talk to friends. She has to complete 20 math skill-work questions for homework, and she wants to complete them before talking to friends. How many minutes will Shontelle have left after completing her math homework? Use a double number line to show this information.

Closing… Name 3 ways you can represent a group of equivalent ratios. List 2 things you learned about double number lines. Rate your understanding of today’s lesson.

Lesson Summary… A double number line diagram is a tool used for understanding the equivalence of two related numbers. It is called double because each mark on the line has two numbers matched to it.