Determine the number of rays formed in a line with the given number of points.
________11) 8 points
________12) 13 points
________13) 11 points
________14) 19 points
________15) 23 points
________16) 28 points
________17) 33 points
________18) 42 points
________19) 39 points
________20) 45 points
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