Question 414533
{{{4x+5y<= 20}}}

add-4x
{{{5y<= -4x+20}}}

divide by 5
{{{y<=(-4/5)x+4}}}
...
The boundary will be {{{y=(-4/5)x+5}}}
The Boundary
{{{graph(300,300,-6,6,-6,6,y=(-4x/5)+5))}}}

The inequality {{{graph(300,300,-6,6,-6,6,y<=(-4x/5)+5))}}}