17:43 (watch on YouTube, opens in a new tab)Transformations Part 4: 90° Rotations and Their Equations | TMUA (watch on YouTube, opens in a new tab)
How do you find the equation of a graph after a 90° rotation, especially when the centre isn't the origin? Using the shape of a curve and the movement of key points to understand a rotation and find the new equation, through four questions: rotating a parabola about a given point, two successive rotations with an unknown centre, counting intersections after rotating a modulus graph, and the equation of a rotated cubic.
- Transformations
- Rotations
- Graph sketching
- Modulus functions