The condition for the point (a, b) to be collinear with the points, (2, 3) and (5, 8), is
3a + 5b = 1
5a − 3b = 1
3a − 5b = 1
5a + 3b = 1
What is the difference between the ordinates of the points (−2, 3) and (5, 8)?