Since a Line has only one dimention LENGTH, the only way to identify a point on it is to measure its distance from a known point ... usually on end or the other.
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It's the middle point of line. Hardly! How far would that be from a point 3/4 way along the line? Try centre of a circle, or of a sphere.
Forty-five point eight six three
If you're only given one point, you can't draw the graph of the line, because there are an infinite number of different lines that all go through that one point. Or, to put it another way, if someone gives you a single point and asks you to draw the line through it, you can draw any old line you want through that point, and nobody can say it's wrong. In order to pin it down to one unique line, you need another piece of information in addition to the one point: either the slope of the line, or another point.
two and eight tenths 2.8 the correct way to write it
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