Ratio and Proportion (Year 9)

Proportion: A comparison between two numbers

Ratio: A ratio shows the relative size of two variables

Direct Proportion: As one variable is multiplied by a scale factor the other variable is multiplied by the same scale factor

Inverse Proportion: As one variable is multiplied by a scale factor the other is divided by the same scale factor

Conversion Graphs: are straight line graphs that show a relationship between two units and can be used to convert from one to another. 

Best Buy: Best buy problems may also be known as cost problems. We have to compare the cost of 2 or more items and then decide which of the items is the best value.

Unitary Method: is a process by which we find the value of a single unit from the value of multiple units.