Answer:
5 units
Step-by-step explanation:
Let's take point X and X' (it will be the same regardless of the point).
The distance is 3 units to the right then 4 units up.
A direct line will be diagonal and can be found using the pythagorean theorem (refer to visual).
(D: a > 0) 3² + 4² = a² --> 9 + 16 = a² --> a² = 25 --> a = 5
So the distance is 5 units.
