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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=fx for -4x6 is shown in the following diagram.

Write down the value of f2.

[1]
a.i.

Write down the value of ff2.

[1]
a.ii.

Let gx=12fx+1 for -4x6. On the axes above, sketch the graph of g.

 

[3]
b.

Markscheme

f2=6        A1

 

[1 mark]

a.i.

ff2=-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 4 and 0 (located roughly at y=3),
A1 for a correct concave down parabola including max point at (2,4) and for correct end points at (0,3) and (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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