Unit Review

What is the scale factor from the smaller triangle to the bigger triangle?

• 2

• 3/2

• 2/3

• 1/2

The triangle shown is being increased by a scale factor of 2. What is the perimeter of the new triangle?

A loaf of bread costs $2.85 there are 19 slices in this loaf. What is the unit rate?

• $ 0.19

• $ 0.15

• $ 0.85

Which describes the unit rate of the family road trip

• traveled 120 miles per hour

• traveled 60 miles per hour

• traveled 30 miles per hour

Which graph can be used ot model a unit rate of $3.50 per gallon?

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• Cashews cost $19 per pound

• Cashews cost $2 per pound

• Cashews cost $9.50 per pound

• Cashews cost $28.50 per pound

A parking lot business charges $9 per car for parking. Which line can be used to model the relationship between money collected and cars in the lot?

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Which is the better buy? A 12-pack of Pepsi for $3.50 or a 6-pack for $1.80?

• The 12-pack

• The 6-pack

• They're the same

• Neither, I prefer Coke

The table shows the cost of long distance calls based on the number of minutes used. Is there a constant rate of change, and if so what is it?

• Yes, 10 calls per minute
• Yes, $.10 per minute
• Yes, $.40 per minute
• Not a constant rate

The tables above the amount of material and buttons that Sara and Karen used to sew a shirt. Is the amount of materials and buttons in BOTH Sara and Karen’s shirts proportional? Explain in detail. 

• Yes, the constant of proportionality for Karen's Shirts is  $\frac{3}{8}$  and the constant of proportionality for Sara's Shirts in  $\frac{4}{9}$  

• No,  the constant of proportionality for Karen's Shirts is  $\frac{3}{8}$  but there is no constant of proportionality for Sara's Shirts 

• No,  the constant of proportionality for Karen's Shirts is  $\frac{3}{8}$  

• Yes, the constant of proportionality for Karen's Shirts is  $\frac{3}{8}$