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Appendix C C-19<br />
MINI PROJECT<br />
A Graphical Approach to Composition of Functions<br />
As we saw in this section, the iteration process can be carried out either algebraically<br />
or graphically. Composition of functions can also be represented<br />
graphically. The accompanying figure shows the graphs of two functions<br />
f and g, the line y x, and an input a. Use the figure and the ideas of this section<br />
to discover the coordinates of the four indicated points. In particular, explain<br />
how to find the point (a, g[ f(a)]) on the graph of the composite function g f.<br />
y<br />
y=x<br />
y=g(x)<br />
y=ƒ<br />
a<br />
x