math questions, can anyone help me out?

[rockezeh03]

Determine if the given points are collinear:

1: (11, 3), (9, -1), and (17, 15)
yes
no


2: (-11, -8), (-6, 10), and (26, -12)
yes
no


3: (-1, -12), (-6, 19), and (-10, 15)
yes
no


4: (-17, -12), (5, -10), and (-6, -11)
yes
no


5: (16, 14), (3, 4), and (42, 34)
yes
no


6: (-6, -2), (-15, 4), and (-12, 2)
yes
no


7: (-10, 9), (-14, 9), and (-25, 0)
yes
no


8: (-6, 2), (16, 12), and (37, 35)
yes
no


9: (12, -19), (3, 13), and (48, -147)
yes
no


10: (-11, 3), (-16, 13), and (-1, -17)
yes
no