Step 1:
To test if a point is a solution to the equation of a line, the point must lie on the line. When substituting the x value of the point, you must get the y value of the point.
Step 2:
Write the equation of the graph.

Step 3:
Let test for points (0, 1/2) and (-7, -3)

Next, let test for points (-7, -3)

Yes, the two points (0, 1/2) and (-7, -3) are solutions to the equation.
You know because both points lie on the line.