Question 88452
Start at the origin (where the the x and y axis intersect)


Now move your pencil 2 units to the left


{{{drawing(500,500,-6,6,-6,6,
grid(1),
blue(arc(-0.5,0,1,2,180,0)),
blue(arc(-1.5,0,1,2,180,0))
)}}}


Now go 4 units down



{{{drawing(500,500,-6,6,-6,6,
grid(1),
blue(arc(-0.5,0,1,2,180,0)),
blue(arc(-1.5,0,1,2,180,0)),
green(arc(-2,-0.5,1,1,90,270)),
green(arc(-2,-1.5,1,1,90,270)),
green(arc(-2,-2.5,1,1,90,270)),
green(arc(-2,-3.5,1,1,90,270))
)}}}


Plot the point where the pencil lands


{{{drawing(500,500,-6,6,-6,6,
grid(1),
circle(-2,-4,0.08),
circle(-2,-4,0.10),
blue(arc(-0.5,0,1,2,180,0)),
blue(arc(-1.5,0,1,2,180,0)),
green(arc(-2,-0.5,1,1,90,270)),
green(arc(-2,-1.5,1,1,90,270)),
green(arc(-2,-2.5,1,1,90,270)),
green(arc(-2,-3.5,1,1,90,270))
)}}}


So here is the point (-2,-4)


{{{drawing(500,500,-6,6,-6,6,
grid(1),
circle(-2,-4,0.08),
circle(-2,-4,0.10)
)}}}