Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Entry Level Assessment - Multiple Choice: 2

Answer

The DOMAIN of a set of points includes all the x values. Points are always written (x, y). Although there are five points in this list, there are only four x values: 2, -1, 0, and 4 (-1 is repeated, so this can not be a function). Put these numbers in order from smallest to largest and list them as a series with brackets like this: {-1, 0, 2, 4}.

Work Step by Step

The domain of a function includes all of the x-values. In each ordered pair, there is (x,y) therefore, take out the x. $(2,-3)$-->$2$ $(-1,0)$-->$-1$ $(0,4)$-->$0$ $(-1,5)$-->$-1$ $(4,-2)$-->$4$ That gives you the numbers $2, -1, 0,$ and $4$.
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