Higher November 2017 Unit 1 Q3
3.
(a) Rotate triangle A through 90° anticlockwise, about the point (–2, 3). [2]

(b) Enlarge triangle B by a scale factor of \(\dfrac{1}{2}\), using (0, 0) as the centre of enlargement. [2]

| Scheme | Marks | Comments |
|---|---|---|
| Correct rotation. | B2 | Allow B1 for two correct vertices. B1 for a 90° clockwise rotation about (−2, 3) OR B1 for a 90° anticlockwise rotation about (3, −2). |
| Scheme | Marks | Comments |
|---|---|---|
| Correct enlargement. | B2 | Allow B1 for two correct vertices. B1 for an enlargement of scale factor ½ but not centred at (0,0). Must be in the correct orientation. SC1 for a correct enlargement using a scale factor of −1/2 centred at (0,0). |