Question 925949
If "pitch" means "slope", then you can start with y=(3/5)x+6, as understood from your separate graph with picture, and let x=10; because x=10 is directly under the middle of the door and grid/grating.  Evaluate y for x=10.


{{{y=(3/5)*10+6}}}
{{{3*2+6}}}
{{{highlight(y=12)}}}


(10,12)