◈ Oracle PrepSign Up Free
O-LevelMathematicsAlgebra and graphs4024/12 · May/June 2019 · Q193 Marks

y is inversely proportional to the square of x. When x = 4, y = 10.

  1. (a)Find the value of y when x = 10.[2]
  2. (b)Describe the effect on y when x is halved.[1]

Mark scheme

Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.

  1. [2] (a) 1.6 oe
  2. [B1] for 'k' = 160 oe if y = k/x² used
  3. [M1] or for 10 × 4² = y × 10² oe
  4. [M1FT] or for y = (their k)/x² when y = "k"/x² used
  5. [1] (b) y is multiplied by 4

Write your answer and get it marked

On Oracle Prep you can write or photograph your own answer and have it marked by AI against this mark scheme, with feedback on what you missed.

Sign up free →

About this question

Topic
Algebra and graphs, O-Level Mathematics (syllabus 4024). Structured question, 3 marks.
Source
O-Level Mathematics, May/June 2019 Paper 1 Variant 2, question 19.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

Related Mathematics questions

Algebra and graphsMay/June 20141m

Solve 4 < 3y - 11.

Algebra and graphsMay/June 20141m

Write down all the integers that satisfy the inequality -4 ≤ 2x < 4.

Algebra and graphsMay/June 20141m

Make a the subject of the formula y = (a-4)/(3-a).

NumberMay/June 20142m

It is given that 3⁄4 < n < 7⁄8.

NumberMay/June 20142m

Here is part of a bus timetable. Bus station 0956 1026 1056 1126 1156 City Hall 1003 1033 …

NumberMay/June 20142m

Express 0.0000852 in standard form.

← Browse all past-paper questions

© 2026 Oracle Prep