SOLUTION: how to graph an equation using two points?

Algebra ->  Linear-equations -> SOLUTION: how to graph an equation using two points?      Log On


   

Question 315914: how to graph an equation using two points?
Answer by checkley77(12844) About Me  (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%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+-9x%2F4+%2B11%2F4%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, -9x/4 +11/4).