The problem is to find the slope of the function at point P. A possible solution is to draw a line tangent to the non-linear function at point P as shown in the following chart.

Learn about and revise how to solve equations using the balance method with this BBC Bitesize GCSE Maths Eduqas study guide.

Learn about and revise how to solve equations using the balance method with this BBC Bitesize GCSE Maths Edexcel study guide.