Finding Proportional Relationships Missing Values

Determine the missing value: 1 block : 21 houses = ? houses : 3 blocks

• 7

• 63

• 21

• 9

Which of these graphs shows a proportional relationship?

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Which of these equations shows a proportional relationship?

• y = 4x - 3

• y = 5x

• y = 2x + 5

• y = -x - 3

Which equation has a constant of proportionality equal to 1?

• y = x

• y = 21x

• y = 21x + 1

• y = x + 21

This is a table with a proportional relationship between A and B.  Find the missing value of B. 

Mathematical Equivalence

ON

Coco is packing kettle corn into bags for snacks. She knows that she packs 6.4 ounces into 4 bags. She creates the following table to find other values for the number of ounces packed to the number of bags used in the same proportion.
Using the first row, Coco ​ (a)   to find the missing value for the second row. If she uses the first row to find the value in the third row, Coco will ​ (b)   .

• divides by 4

• multiply by 2.25

• subtracts by 4

• multiplies by 4

• subtracts 2.25

• divide 2.25

Which of these equations show a proportional relationship? Select two correct answers.

• y = x

• y = 4x + 2

• y = x + 2

• y = 3x

• y = x + 3

• y = 1/5x

• y = 5x

• y = 1/2x

What is the constant of proportionality?

• k = 3

• k = 1/3

• k = 3x

• k = 1/3x

Write the equation of the proportional relationship using the format y = kx.