Question 207299
Y=(-1/3)X+b
-6=(-1/3)3+b
-6=-1+b
b=-6+1
b=-5 
Y=x/3-5 is the equation for this line.
{{{ graph( 300, 200, -6, 15, -10, 10, x/3 -5) }}} (graph 300x200 pixels, x from -6 to 15, y from -10 to 10, x/3 -5).