(2, 1) is not a solution of the equation given below.
To determine which point is not a solution of the equation, you can substitute each set of coordinates into the equation and check if the equation is satisfied.
If you provide the equation you're referring to, I can help you check each point. For example, if the equation is y=2x−3, you would substitute the x and y values from each point and see if the equation holds true.
Point (0, -5) is not a solution of the equation.
Point (2, 1) is not a solution of the equation.
Point (5, 5) is not a solution of the equation.
Point (-2, -9) is not a solution of the equation.