How do you graph the system #x+y<8# and #x>=0# and #y>=0#?
Graph the system of 3 linear functions in 2 variables:
First graph the Line y1 = -x + 8.
The solution set of the inequality (1) is the area below this line. Color it.
The combined solution set is the commonly shared area.
Note. The half-axis Ox and Oy are both included in the solution set.