joel7648 joel7648
  • 04-06-2018
  • Mathematics
contestada

On a cartesian coordinate plane, point a is at (-2, 2) and point b is at (1, -4) what is the equation for line ab

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altavistard
altavistard altavistard
  • 08-06-2018
The slope of this line is

         2-(-4)
m = ------------ = -6/3 = -2.
        -2 - 1

Starting with y = mx + b, -4 = -2(1) + b, or     -4 = -2 + b.  Then b= -2, and the
equation is

y = -2x -2.
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