7th Grade Unit 3(Ratios, Rates, Constant of Proportionality

Front

What is the formula for finding the constant of proportionality?

Back

k = y/x

Front

How do you calculate the unit rate from a total cost and quantity?

Back

Divide the total cost by the quantity.

Front

What does 'unit' mean in mathematics?

Back

One.

Front

If Janet used 155 beads to create 5 necklaces, how many beads did she use for each necklace?

Back

31 beads per necklace.

Front

What is the equivalent rate of $9 per hour?

Back

$27 in 3 hours.

Front

What is a ratio?

Back

A comparison of two quantities.

Front

How do you express a rate?

Back

As a ratio that compares two different units.

Front

What is the constant of proportionality?

Back

The ratio between two proportional quantities.

Front

If a box of cereal costs $3.59 for 30 oz, what is the unit rate per ounce?

Back

12 cents per ounce.

Front

What is the relationship between ratios and rates?

Back

Rates are a specific type of ratio that compares different units.