Key learning outcomes for this video:

• To be able to form and solve equations that represent proportionality.
• Recognise the shape of the graphs for direct and indirect/inverse proportion.

 Cue card notes and useful reminders…

•  We always use the letter ‘k’ to represent the constant of proportionality.

> You calculate this constant by using given values.

> Then write an equation with your calculated value of k.

> Then often you are asked to substitute in a new value to your equation.

•  Indirect proportion and inverse proportion are used to mean the same thing* - one variable increases in proportion as the other decreases