# Proportion in context

In this lesson, we will investigate word proportion problems involving exchange rates, and cost scaling. We will then model their solutions.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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!

Q1.Complete the sentence: When two quantities are in ........................ , when one variable doubles, the other doubles too.

1/8

Q2.Complete the sentence: When two quantities are in direction proportion, when one variable is zero, the other is .............

2/8

Q3.x and y are in direction proportion. When x is 4 y is 11. What is the value of y when x = 12?

3/8

Q4.The cost of T shirts online at £12 each. The postage charge is £3.50 per order. How much will it cost to order 2 T shirts?

4/8

Q5.Think about the previous question: Are the number of T-shirts and the cost in direct proportion?

5/8

Q6.Which table shows direct proportion?

6/8

Q7.What is the constant of proportionality in the table below?

7/8

Q8.What is the constant of proportionality between m and n?

8/8

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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!

Q1.Complete the sentence: When two quantities are in ........................ , when one variable doubles, the other doubles too.

1/8

Q2.Complete the sentence: When two quantities are in direction proportion, when one variable is zero, the other is .............

2/8

Q3.x and y are in direction proportion. When x is 4 y is 11. What is the value of y when x = 12?

3/8

Q4.The cost of T shirts online at £12 each. The postage charge is £3.50 per order. How much will it cost to order 2 T shirts?

4/8

Q5.Think about the previous question: Are the number of T-shirts and the cost in direct proportion?

5/8

Q6.Which table shows direct proportion?

6/8

Q7.What is the constant of proportionality in the table below?

7/8

Q8.What is the constant of proportionality between m and n?

8/8

# 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.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Proportion in Context

Exit Quiz

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 18 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

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Proportion in Context

Exit Quiz

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 18 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

# Lesson summary: Proportion in context

## Time to move!

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

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance