Question 210138
Y=mX+b
4=-1*-5+b
4=5+b
b=4-5
b=-1 ans. for the y intercept.
y=-x-1
{{{ graph( 300, 200, -6, 5, -10, 10, -x -1) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, -x -1).