Solve a variation problem

Steps

1. Write the equation with k (or a and b for partial variation).
2. Put in the given values to find k. Partial variation needs two sets of values and simultaneous equations.
3. Write the full equation with k's value.
4. Use it to answer the question.

For the whole topic, read Variations: key points, common mistakes and how the DSE tests it.

Other methods in this topic