Each point plotted in a corresponds to an 5 curve in b, and when
joined up they give a new curve (really curved this time!). This
process has been demonstrated for only one value of D, but of course
it could be repeated to show the time/speed relationship for other
distances. Fig. B.3b gives numerical expression to the well-known
fact that the greater the speed the shorter is the time to travel a
specified distance.
0
10 20 30 40 50 60 70 80
57"(KM/H
χ
HOURS)
Fig. B.4 A third method of graphing three variables is to combine two of them; in this
example the product of S and Tis used as one of the two variables in the graph
Graphs of thi
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