SOLUTION: how to graph an equation using two points?

SOLUTION: how to graph an equation using two points?

Algebra.Com

Question 315914: how to graph an equation using two points?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
Two points (3,-4) & (-1,5)
Y=mX+b where m=slope & b=the Y intercept.
Slope=(Y2-Y1)/(X2-X1)
Slope=(5+4)/(-1-3)
Slope=9/-4=-9/4 ans.
-4=-9/4*3+b
-4=-27/4+b
b=-4+27/4
b=-16/4+27/4
b=11/4 ans. for the Y intercept.
Y=-9X/4+11/4
(graph 300x200 pixels, x from -6 to 5, y from -10 to 10, -9x/4 +11/4).
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