O-LevelMathematicsVectors and transformations4024/12 · May/June 2018 · Q244 Marks

Triangle A is mapped onto triangle B by a translation, followed by an enlargement with centre (10, −4). The translation maps triangle A onto triangle C. The enlargement maps triangle C onto triangle B.

(a)Write down the scale factor of the enlargement.[1]
(b)Draw triangle C on the grid.[2]
(c)Find the column vector that represents the translation that maps triangle A onto triangle C.[1]

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Mark scheme

Marking points from the official mark scheme (May/June 2018). The mark or mark type is shown in brackets.

[1] 2
[1] B1 for two correct vertices, soi or M1 for a line joining (10, –4 ) to a vertex of triangle B.
[1] Triangle with vertices (5, -1), (8, -1), (8, 1)
[1] (5 / -1)

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Topic: Vectors and transformations, O-Level Mathematics (syllabus 4024). Structured question, 4 marks.
Source: O-Level Mathematics, May/June 2018 Paper 1 Variant 2, question 24.

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