# Inverse proportion

In this lesson, you will explore when two quantities are inversely proportional to each other.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

## Question 5

Q1.1 bar of chocolate costs £2.10. How much do 3 bars of chocolate cost?

1/5

Q2.Four tickets to the cinema cost £42. How much do 8 tickets cost?

2/5

Q3.Four tickets to the cinema cost £42. How much do 9 tickets cost?

3/5

Q4.Fill in the gaps: You can use .............. .............. to work out the best value for money.

4/5

Q5.x and y are directly proportional. What happens to y if x doubles?

5/5

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

## Question 5

Q1.1 bar of chocolate costs £2.10. How much do 3 bars of chocolate cost?

1/5

Q2.Four tickets to the cinema cost £42. How much do 8 tickets cost?

2/5

Q3.Four tickets to the cinema cost £42. How much do 9 tickets cost?

3/5

Q4.Fill in the gaps: You can use .............. .............. to work out the best value for money.

4/5

Q5.x and y are directly proportional. What happens to y if x doubles?

5/5

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

Quiz:

# Inverse Proportion

Exit Quiz

## Question 5

Q1.Fill in the gaps: Two quantities a and b are said to be directly proportional if one quantity is always a constant ........ of the other.

1/5

Q2.Fill in the gaps: Two quantities x and y are said to be inversely proportional if x increases as y ............... at the same rate, so their product is constant.

2/5

Q3.Fill in the gaps: Two variable quantities are said to be ........................ proportional if the product of the two quantities is constant.

3/5

Q4.Three builders take 15 days to complete a project. How many days does would it take one builder?

4/5

Q5.It takes 4 friends 6 hours to clean the garden. How long will it take 2?

5/5

Quiz:

# Inverse Proportion

Exit Quiz

## Question 5

Q1.Fill in the gaps: Two quantities a and b are said to be directly proportional if one quantity is always a constant ........ of the other.

1/5

Q2.Fill in the gaps: Two quantities x and y are said to be inversely proportional if x increases as y ............... at the same rate, so their product is constant.

2/5

Q3.Fill in the gaps: Two variable quantities are said to be ........................ proportional if the product of the two quantities is constant.

3/5

Q4.Three builders take 15 days to complete a project. How many days does would it take one builder?

4/5

Q5.It takes 4 friends 6 hours to clean the garden. How long will it take 2?

5/5

# Lesson summary: Inverse proportion

### Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Jog

On the spot:
Dance

### Take part in The Big Ask.

The Children's Commissioner for England wants to know what matters to young people.