How to approach this question?
In order for the given point to lie on the line, it must satisfy the equation of the line. Check whether y = mx + c holds true where,
- y = y coordinate
- x = x coordinate
- m = slope of the line
- c = y-intercept
So what we have to do is, replace the values of y and x with the given coordinates of the point. If the equation satisfies, it means the given point lies on the line.
Substitute x = 2 and y = -20 in the equation:
=> 1/2 * -20 = -6(2) + 1
=> - 10 ≠ -11
The point (2,-20) is not a solution because it is not satisfying the given equation of line
