Question 64479
Y=mX+b
-10=5*3+b
-10=15+b
b=-1)-15
b=-25 THEN THE EQUATION IS
Y=5X-25
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TO FIND THE SLOPE(m) WE MAKE A FRACTION (Y2-Y1/(X20-X1)
SLOPE=(7-3)/(-3-2)
SLOPE=4/-5
SLOPE=-4/5 NOW WE FIND THE Y INTERCEPT(b) BY USING ONE SET OF POINTS FOR X & Y
3=-4/5*2+b
b=3+4/5
b=19/5 THUS WE HAVE
Y=-4/5X+19/5 FOR THE LINE PASSING THROUGH THESE TWO POINTS.