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Date May 2019 Marks available 2 Reference code 19M.1.SL.TZ2.S_4
Level Standard Level Paper Paper 1 Time zone Time zone 2
Command term Find Question number S_4 Adapted from N/A

Question

The following diagram shows part of the graph of f with x -intercept (5, 0) and y -intercept (0, 8).

Find the y -intercept of the graph of  f ( x ) + 3 .

[1]
a.i.

Find the y -intercept of the graph of f ( 4 x ) .

[2]
a.ii.

Find the x -intercept of the graph of f ( 2 x ) .

[2]
b.

Describe the transformation f ( x + 1 ) .

[2]
c.

Markscheme

y -intercept is 11   (accept (0, 11) )     A1 N1 

[1 mark]

a.i.

valid approach        (M1)

eg  f ( 4 × 0 ) = f ( 0 ) ,   recognizing stretch of 1 4 in x -direction

y -intercept is 8      (accept (0, 8) )    A1 N2 

[2 marks]

a.ii.

x -intercept is  5 2 ( = 2.5 )    (accept  ( 5 2 , 0 ) or (2.5, 0) )    A2 N2 

[2 marks]

b.

correct name, correct magnitude and direction        A1A1 N2

eg   name: translation, (horizontal) shift (do not accept move)

eg   magnitude and direction: 1 unit to the left,  ( 1 0 ) , horizontal by –1

[2 marks]

c.

Examiners report

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

Syllabus sections

Topic 2—Functions » AHL 2.8—Transformations of graphs, composite transformations
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