find the slope.If it is not defined state this..(0,1)(3,-3)(5,-6)(-1,3)(-3,6)

if u draw all quadrants then u will find that all r not im a straight line or it's simple to find a slope when coordinates of two points r given .slope=y2-y1/x2-x1,so to find out the slope u draw a tangent at (3,-3)then proceed further