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PSLE 2018 · Paper 2 · Q11 Statistics · Data: line graph 4 marks: 1 + 1 + 2 · long answer (3 parts) difficulty 3 of 5

PSLE 2018 Paper 2, Question 11: Data: line graph

The answer

(a) $\$3$ · (b) 4 km · (c) $\$4.50$

PSLE 2018 Paper 2 Question 11 · Verified worked solution by the Genius Plus Academy teaching team

What this question tests

This is Question 11 of the PSLE 2018 Paper 2 Mathematics paper. It tests data: line graph, in the Statistics strand. It is worth 4 marks: 1 + 1 + 2. Open your copy of the paper at this question, then follow our full worked solution below.

Step-by-step solution

(a) The graph is flat at $\$3$ from 0 to 2 km, the first kilometre costs $\$3$.

(b) The fare reaches $\$6$ at 4 km, so Weiming travelled 4 km.

Answer: (a) $\$3$ · (b) 4 km · (c) $\$4.50$

Same structure, different costume

A question is hard because of its structure, not its story.

Change egg tarts to badges, a tank to two tanks, a ring of card to a folded sheet, and a child sees a brand new problem. The lock underneath is the same, and so is the key. Once a student can name the structure, a whole row of questions that look different start to open the same way.

It is also where marks really leak. Across fourteen years of papers, the marks lost in PSLE math leak at the reading far more than at the arithmetic, which is exactly why recognising the structure fixes them. We call this Lock and Key: name the lock, then the key follows.

See what the paper rewards → The hardest questions, shown working →

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