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O-LevelMathematicsAlgebra and graphs4024/12 · May/June 2022 · Q152 Marks

y is directly proportional to (x−1)². When x = 5, y = 32. Find the value of y when x = -2.

Mark scheme

Marking points from the official mark scheme (May/June 2022). The mark or mark type is shown in brackets.

[2] 18 B1 for k = 2 if y = k(x – 1)² used or M1 for 32/(5-1)² = y/(-2-1)² or M1FT for y = their k × (–2 – 1)²

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About this question

Topic: Algebra and graphs, O-Level Mathematics (syllabus 4024). Structured question, 2 marks.
Source: O-Level Mathematics, May/June 2022 Paper 1 Variant 2, question 15.

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