Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 5 - Number Theory and the Real Number System - 5.5 Real Numbers and Their Properties; Clock Addition - Exercise Set 5.5 - Page 308: 10

Answer

-1 is rational, integer and real

Work Step by Step

SInce -1 can be written as the fraction $\frac{-1}{1}$, then it is a rational number. IT is an integer because it is the opposite of 1. It is real because all rational numbers are also real numbers.
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