Joan draws a bar chart to show the temperatures at midday on March 1st in five cities.
Joan has made four mistakes
in her diagram.
147
Write down any three of them.
12
Temperature °C
1. There should be equal space
between the bars and the columns.
2. Each bar or columns should be
the same width.
3. The temperature in y axis does not
start with 0.
2
London Paris
Munich Rome Oslo

the answer is 31.27mph

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional