Posted by sonia on Thursday, October 22, 2009 at 7:35pm.
he slope is just the difference in the ys over the differences in the xs. That is, when you move 1 in the x direction, how far do you move in the y direction.
-4 isn't very far off, but it's not the exact answer:
Your Ys are 13.4 and 2.1
Your Xes are -19.3 and -17.3
(Cereful to keep them in the right order, to avoid reversing a sign!)
So your answer is:
(13.4-2.1) / (-19.3 - (-17.3))
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