O-LevelMathematicsAlgebra and graphs4024/23 · May/June 2025 · Q154 Marks
Find the three inequalities that define the unshaded region, R.
- Find the three inequalities that define the unshaded region, R.[4]
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Mark scheme
Marking points from the official mark scheme (May/June 2025). The mark or mark type is shown in brackets.
- [4] B1 for y < 2
- B1 for y ≥ 1/2 x oe
- B2 for y ≥ 2 – x oe
- or B1 for y = 2 – x soi
- If B0 or B1 scored, instead award SC3 for y < 2, y > 1/2 x and y > 2 - x
- or SC2 for y = 2, y = -1/2 x and y = 2 – x soi
- If B0 scored award SC1 for y = -1/2 x soi
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