Question 136639
FIRST YOU NEED TO FIND THE SLOPE (m).
m=(Y2-Y1)/(X2-X1)
m=(-2+1)/(6-9)
m=-1/-3=1/3
NOW REPLACE THE X & Y TERMS IN THE LINE EQUATION [Y=mX+b] & SOLVE FOR THE Y INTERCEPT (b).
-1=9*1/3+b
-1=9/3+b
b+3=-1
b=-1-3
b=-4 THE Y INTERCEPT.
Y=X/3-4 IS THIS LINE EQUATION.
{{{ graph( 300, 200, -6, 15, -10, 10, x/3 -4) }}} (graph 300x200 pixels, x from -6 to 15, y from -10 to 10, x/3 -4).