Question 1102189
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The statement of the problem is incomplete.  How many identified points are there on the number line?<br>
And what do you mean by "can be drawn"?<br>
On the surface, it seems as though the answer should be that 2 rays can be drawn from each identified point on the number line -- one in each direction.  So for n identified points the number of rays would be 2n.<br>
But since the question is unclear, that might not be what you are looking for.<br>
Suppose there are 3 identified points, A, B, and C in that order, smallest to largest.<br>
Are you counting the ray pointing left from A?  Or do you have to name the ray using the identified points?<br>
And if you need to use the identified points to name the rays, are you counting AB and AC as different rays?<br>
Re-post the question, defining the problem precisely.