Date | May 2021 | Marks available | 3 | Reference code | 21M.1.SL.TZ1.1 |
Level | Standard Level | Paper | Paper 1 (without calculator) | Time zone | Time zone 1 |
Command term | Sketch | Question number | 1 | Adapted from | N/A |
Question
The graph of y=f(x)y=f(x) for -4≤x≤6−4≤x≤6 is shown in the following diagram.
Write down the value of f(2)f(2).
Write down the value of (f∘f)(2)(f∘f)(2).
Let g(x)=12f(x)+1g(x)=12f(x)+1 for -4≤x≤6−4≤x≤6. On the axes above, sketch the graph of gg.
Markscheme
f(2)=6f(2)=6 A1
[1 mark]
(f∘f)(2)=-2(f∘f)(2)=−2 A1
[1 mark]
M1A1A1
Note: Award M1 for an attempt to apply any vertical stretch or vertical translation, A1 for a correct horizontal line segment between −4−4 and 00 (located roughly at y=3y=3),
A1 for a correct concave down parabola including max point at (2,4)(2,4) and for correct end points at (0,3)(0,3) and (6,0)(6,0) (within circles). Points do not need to be labelled.
[3 marks]