GCSE Maths - How to Write Algebraic Expressions for Directly Proportional Relationships #90

The video tutorial explains the concept of direct proportionality using examples such as hours worked and money earned, boiling water, and wire length and diameter. It demonstrates how to write equations to express these relationships and solve problems by finding constants of proportionality. The tutorial provides step-by-step guidance on using given values to derive equations and solve for unknowns, emphasizing the importance of understanding proportional relationships in various contexts.

What is the relationship between the number of hours worked and the money earned?

If E represents money earned and H represents hours worked, what equation describes their relationship?

What is the value of K if T = 600 when M = 200?

Explain how to derive the equation linking time and mass from the given values.

How do you find the constant of proportionality when given specific values for T and M?

How would you express the relationship between the length of a wire and its diameter?

What is the diameter of a wire that is 40 centimeters long based on the proportional relationship established?