SOLUTION: Write the equation of the line passing though (5,2) and (4,-2).

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Question 89495: Write the equation of the line passing though (5,2) and (4,-2).

Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
FIRST WE FIND THE SLOPE (m)
(-2-2)/(4-5)
-4/-1=4 FOR THE SLOPE.
NOW WE SUBSTITUTE ONE SET OF X & Y VALUES IN THE LINE EQUATION [Y=mX+b] & SOLVE FOR THE Y INTERCEPT (b).
2=4*5+b
2=20+b
b=2-20
b=-18 THIS IS THE Y INTERCEPT.
SO THE LINE EQUATION IS Y=4X-12 NOW WE GRAPH
+graph%28+300%2C+200%2C+-6%2C+5%2C+-20%2C+10%2C+y+=+4x+-18%29+ (graph 300x200 pixels, x from -6 to 5, y from -20 to 10, y = 4x -18).