Proportions

Front

What is a proportion?

Back

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

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the unknown.

Front

What is a ratio?

Back

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

Front

If the ratio of boys to girls is 3 to 2, how can you express this as a fraction?

Back

The ratio can be expressed as the fraction 3/2.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity of one.

Front

If a car travels 60 miles in 1 hour, what is its speed in miles per minute?

Back

The speed is 1 mile per minute.

Front

How do you find the total cost based on a unit price?

Back

Multiply the unit price by the number of units to find the total cost.

Front

What is the relationship between direct variation and proportions?

Back

Direct variation describes a relationship where one variable is a constant multiple of another, which can be expressed as a proportion.

Front

If 10 apples cost $5, how much do 50 apples cost?

Back

$25.

Front

What is the formula for finding the scale factor in similar figures?

Back

Scale factor = length of one side of the new figure / length of the corresponding side of the original figure.