By Howard Anton; Bernard Kolman

ISBN-10: 0120595656

ISBN-13: 9780120595655

Sensible and proper functions from various disciplines support encourage company and social technology scholars taking a finite arithmetic direction. a versatile employer permits teachers to tailor the e-book to their direction

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**Example text**

Although some of the topics in this chapter may be familiar, others are likely to be new. Because the ideas we shall develop here will be so important in our later work, we shall discuss graphs and functions from the very beginning so we all have a common starting point. The reader may wish to skim the familiar material in this chapter quickly. 1 COORDINATE SYSTEMS In 1637, Rene Descartes (see p. 25) published a philosophical work called Discourse on the Metlwd of Rightly Conducting the Reason.

In a political poll prior to the 1976 presidential election, 420 people surveyed liked Carter 310 people surveyed liked Mondale 280 people surveyed liked both If every person who liked either candidate voted the Carter-Mondale ticket, how many votes did the ticket get from the group of people surveyed? IO. An environmental agency needs to hire a total of 50 employees to monitor water pollution and a total of 60 employees to monitor air pollution. Of those hired, 15 will monitor both. How many employees must be hired?

How ever, some sample members of the solution set can be obtained by substi tuting arbitrary values for x into the right-hand side of ( I ) and solving for the associated values of y. 1. 1 x y = x2 + l solution 0 1 2 3 -1 -2 -3 1 2 5 10 2 5 10 (0, 1 ) ( 1, 2 ) (- 1, 2) (2, 5) (3, 10) (-2, 5) (-3, 10 ) If we plot the points in the solution set of an equation in x and y, we obtain a graphical or geometric picture of the equation. This picture is called the graph of the equation. 1 COORDINATE SYSTEMS / 49 Example 5 Sketch the graph of the equation y = x2 + 1 discussed in Example 4.

### Applied finite mathematics by Howard Anton; Bernard Kolman

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