That depends on the context; but usually an underlining means that somebody wanted to draw attention to something, in this case, to a specific number.
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The line is usually taken to mean that the decimals under the line repeat. And yes, such a number is rational, since it can be converted into a fraction (with whole numerator and denominator).
The number on the written line is different then the number line.
The lowest number under the line!! Btw i luv wiki leaks rather then wikipedia
Do you mean a number line?The question you asked contains the answer. Every point on a number line corresponds to a number, and every number has a corresponding point on the number line.
A line over a whole number means that number repeats for an infinite number of times.