Answer:
9 units
Step-by-step explanation:
Distance, not difference. :)
Because these two points have the same x-coordinate, 0, the line segment connecting them is part of a vertical line. To find the disance between these points, we merely subtract the y-coordinates: 12 - 3 = 9.
That distance is 9 units.
14, 16, 18, 20
y= - frac4/7 x + frac9/7
3, 7
