Question 342261
Replace x with -1 and y with 2.

If you get the same answer on both sides of the equation, then the given point is a solution to the given equation.

2 = (1/2)(-1) - 1

2 = -1/2 - 1

2 = -3/2

As you can, we get two different answers on both sides of the equation.

We can now say that the given point (-1,2) is not a solution of the equation.

In other words, the point (-1,2) does not lie on the graph of your equation.