GCSE Maths - How to Write Algebraic Expressions for Directly Proportional Relationships

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*** WHAT'S COVERED ***
1. Understanding directly proportional relationships.
* How quantities increase together at a constant rate.
* Graphical representation.
2. Writing algebraic expressions for direct proportionality.
* Using the proportionality symbol (∝).
* Converting proportionality statements into equations using a constant (k).
3. Calculating the constant of proportionality (k).
4. Applying the proportionality equation.
5. Worked examples including.

*** EXAM BOARD INFO ***
This video is suitable for maths courses around the world.
KS3 - All on your course
GCSE Foundation - All on your course
GCSE Higher - All on your course
A-level - Not on your course

*** CHAPTERS ***
0:00 Intro to Direct Proportionality
0:27 Writing Equations for Direct Proportion
1:08 Example 1: Time and Mass
2:03 Example 1: Finding the Constant of Proportionality (k)
3:10 Example 1: Writing the Proportionality Equation
3:25 Example 1: Using the Equation to Find an Unknown Value
3:53 Example 2: Length and Diameter
4:32 Example 2: Finding the Constant and Equation
4:59 Example 2: Using the Equation to Find an Unknown Value

*** PLAYLISTS ***










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