Easy -1.8 This is a straightforward recall question about graph transformations requiring only knowledge that a stretch in the y-direction by scale factor k transforms y=f(x) to y=kf(x). It's a 1-mark multiple choice question with no calculation or problem-solving needed, making it significantly easier than average.
2 The graph of \(y = 5 ^ { x }\) is transformed by a stretch in the \(y\)-direction, scale factor 5 State the equation of the transformed graph.
Circle your answer. [0pt]
[1 mark]
\(y = 5 \times 5 ^ { x }\)
\(y = 5 ^ { \frac { x } { 5 } }\)
\(y = \frac { 1 } { 5 } \times 5 ^ { x }\)
\(y = 5 ^ { 5 x }\)
2 The graph of $y = 5 ^ { x }$ is transformed by a stretch in the $y$-direction, scale factor 5 State the equation of the transformed graph.
Circle your answer.\\[0pt]
[1 mark]\\
$y = 5 \times 5 ^ { x }$\\
$y = 5 ^ { \frac { x } { 5 } }$\\
$y = \frac { 1 } { 5 } \times 5 ^ { x }$\\
$y = 5 ^ { 5 x }$
\hfill \mbox{\textit{AQA Paper 1 2018 Q2 [1]}}