Question 717964
x = tables, round, 25 ft^3 packaged
y = tables, rectangular,  35 ft^3 packaged.  


One equation will account for the space which these tables occupy.
{{{25x+35y<=3850}}}


Horizontal axis for round tables, vertical for rectangular tables:
{{{graph(500,500,-10,160,-10,160,-(5/7)x+110)}}}