Question 305591
y=mx+b
-1/4=-1*-4+b
-1/4=4+b
b=-1/4-4
b=-4.25
y=-x-4.25 ans.
{{{ graph( 300, 200, -6, 5, -10, 10,-x -4.25) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, -x -4.25).