Mathematics 4024 · O Level · Transformations

Transformations — practice question

The matrix $\begin{pmatrix}4 & 0 \\ 0 & 1\end{pmatrix}$ is the matrix for the transformation $T$.
(a)[2]

Describe the transformation $T$ in full.

(b)[1]

Transformation $T$ maps triangle $A$ onto triangle $B$. Triangle $B$ has area $x\text{ cm}^2$. Find, in terms of $x$, the area of triangle $A$.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: Stretch, factor $4$, with the $y$-axis invariant / parallel to the $x$-axis

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