The graph would match with the line crossing the Y axis at -2 and going toward the bottom right in a steep way. Down 3 boxes and right one box.
I think the answer is 9! hope this helps!!
2L+2W=157.5
L=W-30
2(W-30)+2W=157.5
2W-60+2W=157.5
+60 +60
4w=217.5
W=54.4(.37 rounded to nearest tenth)
L=24.4