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16

-=M•l:f010~ • Decide how to use your graph -=M•l:t01U~
to find answers to these.
PAGE 22 • Give your answers to the PAGE 23
nearest whole kilometre
or mile.
How many kilometres
would journeys this long be?
a 16 miles b 41 miles
c 26 miles d 51 miles
How many miles would journeys
this long be?
e 15km f 44km g 84km h 101 km
:cztr,Jll N"~r-;..,,,.._41~_.~~u4, - "'"'M.
@] a Mark 6 points in red on the line and letter them a to f.
b Explain what each point tells you.
On the graph, 10 miles convert to 16 kilometres.
So 100 miles would convert to 160 kilometres.
Explain how you could use your graph to help
you work out these.
How many kilometres would journeys this long be?
a 250 miles b 150 miles c 400 miles d 705 miles
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DJ

miles 0 5 10 20 30 40 a 26 km Open: mark six points on the line and explain
that each point allows you to convert the
kilometres 0 8 16 32 48 q5 b 66 km kilometres to miles and the miles to kilometres.

ordered pair (miles, km) (0,0) (5,8) ( 10, 16) (20,32) (30,48) (40,q6) c 42 km
d 82 km

e q miles To use the graph to convert 250 miles, you can
find out what a tenth of 250 (i.e. 25) converts to
Practical: plot and join the points on Resource Master 11 and extend the f 27 (or 28) miles and then multiply the answer by 10.
line.
g 52 miles a 400 km b 240 km c 640 km
h 63 miles d 1128 km [700 miles = l 120 km + 5 miles = 8 km]

a 56 km b 40 km c 80 km d 112 km
Challenge
e 15miles f 45 miles g 40 miles h 65 miles
Open: explain why Practical: design a graph to convert inches to
someone might want centimetres.
to convert miles to [The graph should have axes marked with
kilometres and inches from 0 to 12 and centimetres from 0 to
kilometres to miles. 30.]