Substitute the coordinates of the point into the equation of the line. If the result is true, then the point is on the line.
True
True.
True
true
true
Substitute the coordinates of the point into the equation of the line. If the result is true, then the point is on the line.
True
No. Every point on a contour line has the same elevation.
True.
True.
True
True.
true
true
True
True