O-LevelMathematicsVectors and transformations4024/11 · May/June 2015 · Q244 Marks
The diagram shows triangles A and B. [Figure 24]
- (a)Triangle A is mapped onto triangle B by an enlargement. Find the scale factor, and the centre, of this enlargement.[2]
- (b)Triangle A is mapped onto triangle C by a shear, with invariant line the x-axis and shear factor 2. On the diagram, draw triangle C.[2]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2015). The mark or mark type is shown in brackets.
- [2] scale factor = -2 and centre = (0, 2) soi
- B1 for either
- [2] triangle with vertices (3, 1), (4, 1), (7, 3)
- C1 for two correct vertices, or for triangle with vertices (1, 3), (1, 5), (2, 5)
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