Proportional Relationships

Is this graph proportional?

• Yes
• No

What does k represent in the equation y = kx?

• constant for preparation
• constant of proportionality
• kangaroos
• krispy kreme

How do you find k? 

• x/y
• y/x
• y=kx
• x ⋅ y

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

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

Is this graph proportional?

• Yes
• No

Is this table proportional?

• Yes
• No

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 1.5 cups of water?

• 4 cups of flour
• .75 cups of flour
• 3 cups of flour
• .25 cups of flour

Daniel walked 2/5 mile in 1/4 hour. How fast did he walk, in miles per hour?

• 1.25 miles per hour
• 1/10 miles per hour
• 1.6 miles per hour
• 2 miles per hour

In the equation y = 14x, what is the constant of proportionality?

• y
• x
• 14
• 1/14