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Is $-9$ an irrational number? $\newline$ Choices: $\newline$ (A) yes $\newline$ (B) no

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Classify numbers

Full solution

Q. Is

-9

an irrational number?

\newline

Choices:

\newline

(A) yes

\newline

(B) no

Define irrational number: Define an irrational number. An irrational number is a number that cannot be expressed as a simple fraction, meaning it's not a ratio of two integers. Its decimal form goes on forever without repeating.
Express $-9$ as fraction: Determine if $–9$ can be expressed as a fraction. $\newline$ $–9$ is an integer and can be expressed as a fraction $–9/1$ , where $–9$ is the numerator and $1$ is the denominator.
Compare $-9$ to definition: Compare $–9$ to the definition of an irrational number. $\newline$ Since $–9$ can be expressed as a fraction with integer numerator and denominator, it does not fit the definition of an irrational number.

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