Author note — to cover (Higher)

Higher page, per the A13 braces. Sketch y = f(x) + a as the graph slid a units vertically, on given curves including quadratics and trig graphs; track named points and give the image of a marked point. Horizontal slides and reflections are siblings; stretches like af(x) are A level. (A13)

• Fluency — direct questions on translating a graph up and down, limited to this lesson's stated scope (4 questions).
• Application — use the same skill in unfamiliar or contextual questions without introducing a later method (4 questions).
• Check — questions built around the exclusions and likely misconceptions named in the lesson brief (4 questions).