Question 41158
The equation of a line passing through the points (-3,7) and (5,-1) is
{{{(y-7)/(-1-7) = (x-(-3))/(5-(-3))}}}
or {{{-(y-7)/8 = (x+3)/8}}}
or {{{-(y-7) = (x+3)}}}
or x+y=4
or x/4 + y/4 = 1

{{{graph(300,300,-10,10,-12,12,4-x)}}}
This is a st. line with intercept 4 on each of the coordinate axes.
All points on that side of the line x+y=4 which is opposite to the origin satisfy the inequality x+y >= 4.