Rates, Ratios, Proportions

Front

What is a rate?

Back

A rate is a ratio that compares two different kinds of quantities, often expressed as a quantity per unit of time, such as miles per hour.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the quantity by the number of units to express the rate per one unit.

Front

What is the average speed formula?

Back

Average speed = Total distance / Total time.

Front

If Melissa drives 238 miles in 5 hours, what is her average speed?

Back

48 MPH.

Front

For every 1/2 mile that Sira jogs, she walks 3/4 mile. What is the unit rate of jogging to walking?

Back

2/3 mile.

Front

What is an equivalent ratio?

Back

An equivalent ratio is a ratio that expresses the same relationship between two quantities, even if the numbers are different.

Front

Find a ratio equivalent to 14/15.

Back

28/30.

Front

What does it mean for ratios to be proportional?

Back

Ratios are proportional if they represent the same relationship, meaning their cross products are equal.