WJEC Unit 1 Specimen — Question 11 3 marks

Exam BoardWJEC
ModuleUnit 1 (Unit 1)
SessionSpecimen
Marks3
PaperDownload PDF ↗
Mark schemeDownload PDF ↗
TopicInequalities
TypeWrite inequalities from graph
DifficultyModerate -0.8 This question requires identifying three inequalities from a diagram: one for the parabola (y < 6 + 4x - x²), one for the line (y > x + 2), and one for the x-axis or boundary. It's straightforward pattern recognition with no calculation needed, just understanding inequality notation for regions. Easier than average as it tests basic coordinate geometry concepts without computation.
Spec1.02h Express solutions: using 'and', 'or', set and interval notation1.02i Represent inequalities: graphically on coordinate plane

\includegraphics{figure_11} The diagram shows a sketch of the curve \(y = 6 + 4x - x^2\) and the line \(y = x + 2\). The point \(P\) has coordinates \((a, b)\). Write down the three inequalities involving \(a\) and \(b\) which are such that the point \(P\) will be strictly contained within the shaded area above, if and only if, all three inequalities are satisfied. [3]

AnswerMarks Guidance
\(a > 0\)B1 AO1
\(b > a + 2\)B1 AO1
\(b < 6 + 4a – a^2\)B1 AO1
Total: [3]
$a > 0$ | B1 | AO1
$b > a + 2$ | B1 | AO1
$b < 6 + 4a – a^2$ | B1 | AO1

**Total: [3]**

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\includegraphics{figure_11}

The diagram shows a sketch of the curve $y = 6 + 4x - x^2$ and the line $y = x + 2$. The point $P$ has coordinates $(a, b)$. Write down the three inequalities involving $a$ and $b$ which are such that the point $P$ will be strictly contained within the shaded area above, if and only if, all three inequalities are satisfied. [3]

\hfill \mbox{\textit{WJEC Unit 1  Q11 [3]}}