Unit Rate and Constant of Proportionality Review

Unit Rate and Constant of Proportionality Review

Open Ended

Unit rate always has to have what number at the bottom? Meaning we are finding the rate of _ unit.

Multiple Choice

What operation do you use to find unit rate?

• addition

• subtraction

• multiplication

• division

Always divide the numerator by denominator to get the unit rate.

Open Ended

Steak at Times costs $9.81 for 1.8 pounds. What is the unit rate?

Open Ended

Steak at Costco costs $16.83 for 3.4 pounds. What is the unit rate?

Multiple Choice

Which store has the better deal?

• Times

• Costco

Why is Costco the better deal?

Multiple Choice

How do you change a fraction to a decimal?

• Add a decimal between the numerator and denominator

• Multiply the numerator and denominator

• Divide the numerator by the denominator

• Divide the denominator by the numerator

Basic Fraction to Decimal Conversions

• 1/2 = 0.5

• 1/4 = 0.25

• 3/4 = 0.75

• 1/10 = 0.1

Open Ended

 $3\ \frac{3}{4}$  What is as a decimal?

Open Ended

What is $2\ \frac{1}{2}$  as a decimal?

Open Ended

What is $4\ \frac{1}{10}$  as a decimal?

Remember to change the fractions to decimals before dividing to find the unit rate.

Constant of Proportionality

Multiple Choice

What is the equation for Constant of Proportionality?

• k = x/y

• k = y/x

• x = y/k

Multiple Choice

What is the constant of proportionality for the following graph?

• 80
• 20
• 40
• 160

Multiple Choice

What is the constant of proportionality? 

• 1/3
• 3
• 5
• 10