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Find the title of today's lesson by decoding these coordinates:(4,7)(2,4)(6,5)(1,8)(1,8)(1,1)(5,6) (6,8)(5,6)(6,5)(1,6)(4,4)(4,7)
Scatter Graphs
LO:All: To be able plot a scatter graph.
Most: To be able to interpret correlation.Some: To be able to identify when a scatter
graph is useful and when it isn’t. Level 6
Is there a relationship between Age and Height?
5 6 7 8 9 10 1211
110
120
130
140
150
160
100
Hei
gh
t (c
m)
Age (years)
Age (years) 12 7 8 12 12 6
Height (cm) 132 130 128 143 132 120
Tes
t sc
ore
Time spent doing homework (minutes)
Positive correlation
Maths scoreS
cien
ce s
core
weak positive correlation
Rainfall (mm)
Tem
pera
ture
(°C
)
Electricity used (kWh)
Out
door
tem
pera
ture
(ºC
)
Negative correlation
weak negative correlation
The number of firemen fighting a fire and how big
the fire is.
What type of correlation would you expect?
Nu
mb
er o
f fi
re m
en
Size of fire
During summer, the number of people with hayfever and the amount of pollen in the air.
What type of correlation would you expect?
Nu
mb
er o
f p
eop
le w
ith
h
ayfe
ver.
Amount of pollen in the air
The length of someone's hair and their shoe size.
What type of correlation would you expect?
Hai
r le
ng
th.
Shoe size.
Amy scored 20 marks in maths and 75 mark in art. Which cross represents her scores?
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B
C
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E
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G
H
IJ
Which type of correlation would you expect there to be on a scatter graph, between
outside temperature and sales of ice cream?