How do solve #1/x+1>=0# graphically?
First graph the line
With graph plotted, there will be four possible regions: A, B , C , D
We have to test coordinates in each region to identify which are included regions and which are excluded regions:
Region A is an excluded region.
Region B is an excluded region.
Region C is an included region.
Region D is an included region.
Shade included regions C and D