On a motorway there is a minimum speed of 30 m.p.h. and a maximum speed of
70 m.p.h.
(a)
(b)
Copy the diagram below and represent this information on it. The letter, V, is
used to represent the speed.
0
+
10
+
30 40 50
+ +
20
60
70 80
Write down an inequality to describe your diagram.