Tutorial
GCSE Maths: Direct Proportion and Recipes
Learn the concept of direct proportion and how to solve problems using two key methods: the unitary method and the scaling factor method. This deck focuses on a common real-world application: scaling recipes up or down to serve a different number of people.
Tutorial
GCSE Maths: Direct Proportion and Recipes
Learn the concept of direct proportion and how to solve problems using two key methods: the unitary method and the scaling factor method. This deck focuses on a common real-world application: scaling recipes up or down to serve a different number of people.
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Deck Contents
15 CardsLesson#1
In this deck, you'll learn about direct proportion. This is a key idea in maths that shows up in everyday situations, especially when scaling recipes up or down. By the end, you'll be able to solve proportion problems using a simple and reliable method.
Lesson#2
Two quantities are in direct proportion when they increase or decrease at the same rate. For example, if you're paid by the hour, the more hours you work, the more you earn. If you double the hours, you double your pay. The ratio between the two quantities always stays the same.
Quiz#3
If two quantities are in direct proportion, what happens to the second quantity when the first one doubles?
It also doubles
Quiz#4
What mathematical relationship stays constant between two quantities in direct proportion?
The ratio
Lesson#5
A powerful way to solve problems involving direct proportion is called the unitary method. The name comes from the word 'unit', which means one. The main idea is to first work out the value of a single unit.
Quiz#6
In the unitary method for solving proportion problems, what is the first thing you always find the value of?
One unit
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