Here’s how to classify the given numbers:
Rational
- 1/4 (a fraction, which is a rational number)
- 18/3 (equals 6, which is a rational number)
- -0.5 (can be expressed as -1/2, which is a rational number)
Irrational
- √2 (does not terminate or repeat)
- √9 (equals 3, which is a rational number, we had a mistake here - it should be in Rational)
So, the classifications should be:
- Rational: 1/4, 18/3, -0.5, √9
- Irrational: √2
Please adjust the responses if √9 was inadvertently classified. If the classification stands, it should only have:
- Irrational: √2
Let me know if you need further assistance!