Graph the points and state whether they are collinear.
1) (0,0), (4,2), (6,3)

2) (-1,1), (2,-2), (4,-3)

3) (-2,0), (0,4), (2,0)

4) (0,0), (6,0), (9,0)

5) (1,2) (2,3), (4,5)

6) (-4,-1), (-1,-2), (2,-3)