Proportional Relationships Intro

How many cups of rice are needed to serve 45 people?

A bakery uses 8 tablespoons of honey for every 10 cups of flour to make bread dough. Some days they bake bigger or smaller batches, but they always use the same ratio of honey to flour. Complete the table by filling in the values of D, E, and F.

4 quarters are equal in value to 10 dimes. Find the values of A, B, and C

What could each of the number lines represent? Invent a situation and label the diagram. What are the values of B and C?

Which situation represents a proportional relationship?

Select the correct answer ○ in each row.

A family makes homemade pickles. They pick the pickles at a rate of 80 pickles per 5 jars. Which answer choices best represent packing y pickles in x jars at that rate? Select TWO correct answers.

Answer the following questions.

c

d

g

i

f

y = 1500x

yes

4500

no

100

y=4500x

10

10,500

1,500

y=10x

A restaurant orders corn tortillas and flour tortillas. The ratio of the number of corn tortillas to the number of flour tortillas is 2 : 3. What is the ratio of the number of flour tortillas to the total number of tortillas?

• 3 : 8

• 3 : 5

• 2 : 8

• 2 : 5

What is k in this proportional relationship?

• 60 

• 120

• 1

• 180

The table is​ ​ (a)   , because it ​ (b)   a constant ratio.

If so, what is the constant of proportionality?​ (c)  

• non-proportional

• proportional

• does not have

• has

• no constant

• k=14

Answer explanation

A proportional relationship means that two quantities maintain a constant ratio. In this case, the relationship does not exhibit a constant ratio, hence the answer is No.