Proportional Reasoning Quiz #1

Which is the "better buy" for shampoo?

• 12 oz. for $2.89

• 15 oz. for $3.59

Which is the "better buy" for dog food?

• 4 lbs. for $2.79

• 5 lbs. for $3.50

Which is the "better buy" for tissues?

• $1.09 for 200

• 175 for $0.93

Based on the table, is y proportional to x?

• Yes

• No

Based on the table, is y proportional to x?

• Yes

• No

Find the constant of proportionality.

Find the constant of proportionality.

Find the constant of proportionality.

Each graph shows the rate charged by four different landscapers. Which graph shows a direct proportion?

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Which table shows a proportional relationship with the constant of proportionality as  $\frac{2}{5}$ ? 

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