Question

Whis of the following ordered pairs below is not on the same line as the other three ordered pairs? Why?
(2,-3), (-2,2), (0,-1), (4,-7)

Answer 1

compute some slopes. see which match

Answer 2

first two slope is
\[\frac{2-(-3)}{-2-2}=-\frac{5}{4}\]

Answer 3

second two

\[\frac{2-(-1)}{0-(-2)}=\frac{3}{2}\]\]

Answer 4

first and third
\[\frac{-1-(-3)}{0-2}-1\]\]

Answer 5

first and 4th also -1
\[\frac{-7+3}{4-2}=-1\]\]

Answer 6

meant -2 sorry

Answer 7

first and third, first and fourth have slope -2. point (-2,2) not on the line

Answer 8

all others have slope -2