constant of proportionality

A box of cereal cost $3.59 for 30 oz. How much is the unit rate per ounce? Round to the nearest cent.

• 11 cents
• 12 cents
• 13 cents
• 10 cents

Write an equation for this relationship.

• y = 18x
• y = 18.50x
• y = 22.50x
• y = 22x

Identify the constant of proportionality.

• k = 1/0.45

• k = 0.45

• k = -0.45

• k = -1/0.45

• none (not proportional)

Identify the constant of proportionality.

• k = 2

• k = 3

• k = 1.50

• k = 2/3

• none (not proportional)

The constant of proportionality in the equation y = ½x is _______. 

• x
• y
• 1/2
• 2

The constant of proportionality can be found by finding the __________  _____________.

• unit rate
• ratio rate
• proportion answer
• rational number

What is the constant of proportionality?

• $3
• $4
• $2
• $9

Which equation helps you solve for k?

• k = x/y

• k = y/x

• k = y + x

• k = 2x

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

What is the constant of proportionality for the following graph?

• 80
• 20
• 40
• 160