Examstyle Questions: Graphs

The graphs of eight functions are sketched below.
Which graph could represent
a) y = 5  3x
b) y = ^{12}/_{x}
c) y = 2x^{3}
(Marks available: 3)
Answer outline and marking scheme for question: 1
a) 8
b) 2
c) 6
(Marks available: 3)

The graph shows the speed of a car in kilometres per hour (km/h).
a) What is the speed of the car after 10 seconds?
(1 mark)
b) After 30 seconds, the car travels at a steady speed of 60 km/h for 1 minute. Continue the graph by drawing a line AB to show this.
(1 mark)
c) Draw a straight line from B to the point C (110,0).
(1 mark)
d) What does the graph between B and C tell you about what the car is doing?
(1 mark)
(Marks available: 4)
Answer outline and marking scheme for question: 2
a) 20km/h
b) Horizontal straight line, ending at (90,60).
c) Straight line from (90,60) to (110,0)
d) 'Slowing down' or 'stopping'
(Marks available: 4)