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Algebra, Functions, Graphs, and Vectors 51

x x 1 0
1
0
2
y (0) 2(0) 1 0 0 1 1
1

(x ,y ) (0,1)
1
1
x x 2 1
0
2
2
y (1) 2(1) 1 1 2 1 4
2

(x ,y ) (1,4)
2
2
The five known pointð are plotted as shown in Fig. 1.13. From
these, the curve can be inferred.
Example B. Consider the following formula:

2
y 2x 4x 5
The base point is:

2
Figure 1.13 Plot of the parabolł y x 2x 1.