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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 -4x64x6 is shown in the following diagram.

Write down the value of f(2)f(2).

[1]
a.i.

Write down the value of (ff)(2)(ff)(2).

[1]
a.ii.

Let g(x)=12f(x)+1g(x)=12f(x)+1 for -4x64x6. On the axes above, sketch the graph of gg.

 

[3]
b.

Markscheme

f(2)=6f(2)=6        A1

 

[1 mark]

a.i.

(ff)(2)=-2(ff)(2)=2       A1

 

[1 mark]

a.ii.

     M1A1A1

 

Note: Award M1 for an attempt to apply any vertical stretch or vertical translation, A1 for a correct horizontal line segment between 44 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]

b.

Examiners report

[N/A]
a.i.
[N/A]
a.ii.
[N/A]
b.

Syllabus sections

Topic 2—Functions » SL 2.11—Transformation of functions
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Topic 2—Functions

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