+0  
 
0
65
2
avatar

How many different lines pass through at least two points in this 3-by-3 grid of lattice points shown?

 Dec 23, 2019
 #1
avatar
0

There are c(9,2) = 36 lines that pass through two points. However, we must subtract the double counts, which gives us 36 - 18 = 18 lines.

 Dec 23, 2019
 #2
avatar
0

it says at least 2, would that change the answer?

Guest Dec 23, 2019

38 Online Users

avatar
avatar
avatar
avatar