tw101
  • tw101
How do I prove that when two points are connected create a positive or negative slope? I have to prove points: (2,5)(12,19) make a positive line. And then points (21,5)(12,19) create a negative line. But im not sure how to prove it.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Mertsj
  • Mertsj
Do you know the slope formula?
tw101
  • tw101
is it the m= y2-y1/x2-x1?
Mertsj
  • Mertsj
yes. Just use that on each pair of points to show that one slope is positive and the other negative.

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tw101
  • tw101
okay one second
tw101
  • tw101
okay, for the positive slope points I got 7/5 when I plugged the points into the formula
Mertsj
  • Mertsj
Me too. Go for the next one.
tw101
  • tw101
okay i got 14/-9
Mertsj
  • Mertsj
me too.Good job.

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