Double number lines

In this lesson, we will understand how to use double number lines to represent proportion problems.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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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.Fill in the gap: the diagram shows a triangle that has been _________ by a scale factor of 3.5.

1/5

Q2.Fill in the gap: the ratio between the side lengths AB and BC is 2 : ____.

2/5

Q3.Fill in the gaps: The _______ between the side length DE and EF is also 2 : ___.

3/5

Q4.Fill in the gap: The constant of _________ between the two triangles is 3.5.

4/5

Q5.What is the length of DE?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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.Fill in the gap: the diagram shows a triangle that has been _________ by a scale factor of 3.5.

1/5

Q2.Fill in the gap: the ratio between the side lengths AB and BC is 2 : ____.

2/5

Q3.Fill in the gaps: The _______ between the side length DE and EF is also 2 : ___.

3/5

Q4.Fill in the gap: The constant of _________ between the two triangles is 3.5.

4/5

Q5.What is the length of DE?

5/5

Video

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Worksheet

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

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

Double number lines quiz

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.If a double number line starts with 4 on the top and 3 on the bottom, what will be the first number that appears both above and below the lines?

1/5

Q2.On a double number line, 10 is above the line and 40 is below the line. What is the constant of proportionality?

2/5

Q3.On a double number line, 4 is above the line and 4.8 is below the line. What is the constant of proportionality?

3/5

Q4.What is the missing number (indicated by the empty box) on this number line?

4/5

Q5.What is the constant of proportionality for this number line?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

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

Double number lines quiz

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.If a double number line starts with 4 on the top and 3 on the bottom, what will be the first number that appears both above and below the lines?

1/5

Q2.On a double number line, 10 is above the line and 40 is below the line. What is the constant of proportionality?

2/5

Q3.On a double number line, 4 is above the line and 4.8 is below the line. What is the constant of proportionality?

3/5

Q4.What is the missing number (indicated by the empty box) on this number line?

4/5

Q5.What is the constant of proportionality for this number line?

5/5

Lesson summary: Double number lines

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The next lesson in:
Ratio (8.6a)
is:
The rule of four

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