Higher November 2020 Paper 4 Q12
12 Triangle T is drawn on a coordinate grid.
(a) Translate triangle T by vector \(\begin{pmatrix} -6 \\ 2 \end{pmatrix}\). [2]
(b) Describe fully the single transformation that is equivalent to:
- a reflection in the line \(y = x\), followed by
- a reflection in the \(x\)-axis.
You may use the grid above to help you. [3]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| Triangle at (−1,3) (−1,5) (−4,3) | 2 | B1 for either a correct translation 6 left or a correct translation 2 up | See overlay and for accuracy mark intent (± 2 mm by eye), condone good freehand |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| Rotation | 1 | if 0 or 1 scored | mark to the candidate’s advantage, for centre accept origin and O |
| [centre] (0, 0) | 1 | B1 for correct reflection in \(y = x\) on graph | |
| 90° clockwise or −90° or 270° anti-clockwise | 1 | B1 for correct reflection in \(x\)-axis on graph | |