Higher June 2018 Paper 2R Q21
21 Here is the graph of \(y = \mathrm{f}(x)\)

(a) On the grid above, draw the graph of \(y = 2\mathrm{f}(x)\) (2)
Here is the graph of \(y = \mathrm{f}(x)\)

(b) On the grid above, draw the graph of \(y = \mathrm{f}(-x)\) (2)
| Scheme | Marks |
|---|---|
| (−2, −2), (1, 6), (4, −2) plotted and joined | B2 |
| (2) |
Notes
B2: Fully correct graph – professional judgment required.
(B1 for (1, 6) plotted OR (−2, −2) and (4, −2) plotted)
| Scheme | Marks |
|---|---|
| (2, −1), (−1, 3), (−4, −1) plotted and joined | B2 |
| (2) | |
| (4 marks) |
Notes
B2: Fully correct graph – professional judgment required.
(B1 for 2 of the 3 points plotted)
SC B1 for a correct reflection in the \(x\)-axis