Chapter 2 - Real Numbers - 2.3 - Real Numbers and Algebraic Expressions - Problem Set 2.3 - Page 68: 6

Real, irrational, negative

Because it is a non-repeating decimal, we know that it is an irrational number. Because all irrational numbers are real numbers, we know that it is a real number as well. There is a negative sign in front of the number, so we know that it is negative.