Specification References: N3.3h N3.3h Solve problems involving ratio and proportion, including the unitary method of solution, direct and indirect proportion and exponential growth |
This reference includes all the requirements of N3.3 and some additional requirements for the Higher tier only.
Direct and inverse proportion questions will be restricted to the following proportionalities:
, , , , , , , , ,
The expected approach would be to set up an equation using a constant of proportionality. Find this and then use the equation to find a value of y given x, or x given y. Other methods may be used and can be given full credit.
Candidates should note that division in a given ratio is assessed in Unit 2 only.