O-LevelAdditional MathematicsEquations, inequalities and graphs4037/12 · May/June 2021 · Q25 Marks
On the axes, sketch the graph of y = |4-3x|, stating the intercepts with the coordinate axes.
- (a)On the axes, sketch the graph of y = |4-3x|, stating the intercepts with the coordinate axes.[2]
- (b)Solve the inequality |4-3x|≥ 7.[3]
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Mark scheme
Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.
- [1] B1 for symmetrical V shape in the correct quadrant, touching the x-axis. Must have straight lines.
- [1] B1 for x = 4/3 and y = 4 only, either seen or stated on a modulus graph.
- [1] B1 for -1 from a correct method.
- [1] B1 for 11/3 or 3.67 or better, from a correct method.
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