Is the origin in the solution of \(x+y\geq -3\)?

Correct answer: Yes

Substituting the origin \((0,0)\) gives \(x+y=0+0=0\). Since \(0\geq -3\) is true, the origin belongs to the solution region of the inequality. It is not only on the boundary, because the boundary line is \(x+y=-3\), whereas the sum at the origin is 0. Exam tip: To test whether a point lies in a solution region, substitute its coordinates into the inequality and check whether it is true.