Question 129731
FIRST YOU NEED TO FIND THE SLOPE.
(Y2-Y1)/(X2-X1)
(1-2)/(-4+5)=-1/1=-1 FOR THE SLOPE.
NOW REPLACE THE X & Y TERMS BY ONE SET OF (X,Y) COORDINATES & SOLVE FOR THE Y INTERCEPT (b) IN THE LINE EQUATION [Y=mX+b]
-2=-1*1+b
b=-2+1
b=-1 Y INTERCEPT.
THUS THE LINE EQUATION IS;
Y=-X-1