A

S

C

T

E

R

E

P

H

B

G

D

F

I

J

K

L

M

N

O

R

U

VW1

2

3

4

5

6

7

8

9

0 1 2 3 4 5 6 7

8

9

Y

X

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

Is there a relationship between forearm and hand span?

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

House number

IQ

No 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?

A

B

C

D

E

F

G

H

IJ

What type of correlation does this scatter graph show?

Which diagram shows weak negative correlation?

Which type of correlation would you expect there to be on a scatter graph, between

outside temperature and sales of ice cream?

Number of Bees

Ice creams sold

x

xx

xx

xx

x

x

x xx

x x

Is this a sensible scatter graph?