This is a complete lesson on inverse functions and includes a mastery worksheet within the powerpoint.
The lesson includes a starter activity based on rearranging equations (from AQA's UK topic tests).
A clear explanation on what an inverse function is and how to calculate inverse functions.
2 full examples on calculating inverse functions.
A couple of questions for the students to try altogether before the worksheet.
A mastery worksheet split into 3 sections (fluency, reasoning and problem solving) so students can master the topic.
Answers for the worksheet.
Plenary question getting students to think about whether all functions have an inverse.
If you would like to change the year in the PowerPoint (I have taught this topic to year 10 in the UK) all you need to do is to view slide master and change the master slide.