A point lies on a line if the coordinates of the point satisfy the equation of the line.
There are infinitely many points on the line. One such is (-6, 3.33...)
The points are (-0.25, 0) and (0, 1)
Depending on the domain of x, there are infinitely many points on the line. Select any value for x, calculate y = -2 - 3x. Then the point (x, -2 - 3x) is on the line.
The point lies 1 unit below the regression line.
It is every point in the plane that lies on the straight line defined by the equation -5x + 4y = -3. Since there are an infinite number of points on that line, there is no point in trying to list them.
A point - unless the line lies within the plane, or is parallel to it.
You just defined a ray. ■
It lies in middle of the DC load line of that Amplifier.
The point lies directly on the regression line.