How many lines are determined by 9 points if no 3 points lie on a straight line?
A)72
B)32
C)25
D)29
E)36

Name: How many lines are determined by 9 points if no 3 points lie on a straight line? A)72 B)32 C)25 D)29 E)36
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Question

Quizplus · Accepted Answer

The number of lines determined by 9 points with no 3 points lying on a straight line is given by the combination formula for choosing 2 points out of 9, which is 9C2 = (9*8)/(2*1) = 36.

How Many Lines Are Determined by 9 Points If No