Easy -1.2 This is a straightforward transformation question requiring recognition that y = 3x² + 15 = 3(x² + 5), representing a vertical stretch by scale factor 3. It's a single-step problem testing basic understanding of transformations with no algebraic manipulation or problem-solving required, making it easier than average.
5 State the transformation which maps the graph of $y = x ^ { 2 } + 5$ onto the graph of $y = 3 x ^ { 2 } + 15$.
\hfill \mbox{\textit{OCR MEI C2 Q5 [2]}}