Lesson 2.9 Solving Problems about Prop. Relationships

Identify the constant of proportionality. Write an equation to relate weight, w, to the price, p.

• k = .45; p = .45w
• k = .22; p = .22w
• k = 45; p = 45w
• k = 22; p = 22w

Tags

CCSS.7.RP.A.2B

Find the unit rate:  $3.60 for 3 pounds of apples. How much does it cost for 1 pound of apples?

• $1.00 per pound
• $3.60 per pound
• $1.20 per pound
• $1.10 per pound

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Is this table proportional?

• Yes
• No

Tags

CCSS.7.RP.A.2A

Jasmin is baking a cake that calls for 1/4 cup water for every 1/2 cup of flour. How much flour will she need if she uses 1 1/2 cups of water?

• 4 cups of flour

• .75 cups of flour

• 3 cups of flour

• .25 cups of flour

In the equation y = 7x, what is the constant of proportionality?

• y

• x

• 7

• 1/7

Alexis used 2.5 cups of Oreo bits in a dish that serves 10 people. Kaden used 1.6 cups of Oreo bits in a dish that serves 8 people. How much more Oreo is in one serving of Alexis' dish?

• .5 cup

• .05 cup

• .2 cup

• .25 cup

Find the unit rate of 624 calories in 3 servings.

• 1,872 calories per serving
• 208 calories per serving
• 624 calories per serving
• 621 calories per serving

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

CCSS.6.NS.B.2

CCSS.6.RP.A.3

• y = 14x ; 133 parts
• y = 1/14x; .68 parts
• y = 14x ; 130 parts
• y = 1/14x; .66 parts

Tags

CCSS.HSF-LE.A.1B

Is the given table a proportional relationship? If so, write an equation that relates y to x.

• Yes;  y=1/3x
• Yes;  y=3x
• Yes;  y=5x 
• No

Tags

CCSS.7.RP.A.2A

Perry earned $96 shoveling snow from 8 driveways.  At that rate, how much would he have made if he had shoveled only 6 driveways?

• $120
• $12
• $84
• $72

Tags

CCSS.6.RP.A.3B