Proportions

Front

What is a proportion?

Back

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

Front

How do you find a missing value in a proportion?

Back

To find a missing value in a proportion, you can use cross-multiplication.

Front

If 1.5 cups of milk is to 3 cups of flour, what is the ratio of milk to flour?

Back

The ratio of milk to flour is 1:2.

Front

What is the formula for direct variation?

Back

The formula for direct variation is y = kx, where k is a constant.

Front

If a car travels 280 miles in 7 hours, what is its speed?

Back

The speed is 40 miles per hour (280 miles / 7 hours).

Front

What is the relationship between distance and time in direct variation?

Back

In direct variation, as time increases, distance also increases proportionally.

Front

If 5 cups of flour are used, how much milk is needed to maintain the proportion of 1.5 cups of milk to 3 cups of flour?

Back

2.5 cups of milk are needed.

Front

Is 4/8 equal to 1/2?

Back

Yes, 4/8 is equal to 1/2, so it is a proportion.

Front

What does it mean if two ratios are not proportional?

Back

If two ratios are not proportional, it means they do not have the same value when simplified.

Front

If x/4 = 3/12, what is the value of x?

Back

x = 1.