# Question #92027

##### 2 Answers

A = n B

A and B are proportional

A = n/B

A and B are inversely proportional.

#### Explanation:

It should be clear now.

Direct: as one quantity increases, the other also increases.

Inverse: as one quantity increases, the other decreases.

#### Explanation:

In a proportion, we are comparing the amounts of two quantities.

In a direct proportion, as one of the quantities INCREASES the other also INCREASES.

In an inverse proportion, as one quantity INCREASES the other DECREASES.

Direct:

MORE boxes of cereal will cost MORE money.

MORE people will eat MORE food.

LESS money will buy FEWER sweets.

MORE clothes will need MORE suitcases.

Inverse:

A task shared by MORE people will take LESS time.

Travelling at a FAST speed will take LESS time for a journey.

If MORE people share a pizza. each person will get LESS.

MORE expensive price means FEWER items can be bought for the same amount of money.

Each type of proportion has a constant. (

In DIRECT proportion, find the constant by DIVIDING the matching quantities. (they are equivalent fractions:)

In INVERSE proportion, find the constant by MULTIPLYING the matching quantities:

If you call the two quantities

Direct proportion:

Inverse proportion:

Hope this helps.