Ratio Tables

​Lesson 5-1: Ratios and Ratio Tables

​Objectives:

• I can write and interpret ratios involving rational numbers.

• I can use various operations to create tables of equivalent ratios.

• I can use ratio tables to solve ratio problems.

Vocabulary

• Ratio,

• Value of a Ratio

• Equivalent Ratios

• Ratio Table

​

	A ratio table organizes data into columns that are filled with pairs of numbers that have the same ratio or are equivalent. Equivalent ratios express the same relationship between two quantities.

Standards: 7.RP.3

• Solve real-world and mathematical problems involving ratios and percentages using proportional reasoning(e.g., multi-step dimensional analysis, percent increase/decrease, tax)

Finding a pattern:

So if we know that 7 x 2 = 14, that means we need can find the first blank by multiplying by the 5 x 2 to get 10.

Same with the second blank. We know 7 x 9 = 63, so we would do 5 x 9 to get 45.

Multiple Choice

What is the value of B in the ratio table?

• 3

• 9

• 2

• 6

Multiple Choice

What would be a pattern I could use here?

• Multiply the numbers in the left column by 5

• Multiply the numbers in the left column by 6

• Divide the numbers in the left column by 5

Multiple Choice

What could I multiply column A by to equal column B?

• 9

• 8

• 7

• 2.5

Multiple Choice

What is A?

• 84

• 7

• 28

• 82

Multiple Choice

If Kevin is mixing 35 oz of yellow paint, he will need how many oz of red?

• 21 oz

• 24 oz

• 33 oz

• 18 oz

Multiple Choice

Hilbert burns 120 calories per 30 minutes of weight training. Complete the table to chart his calorie expenditure for different amounts of time. What is value of b?

• b= 80

• b= 40

• b= 4

• b= 240