Answer:
15 units
Step-by-step explanation:
As we travel from the 2nd point to the 1st, x increases by 9 units and y decreases by 12 units.
Adapting the distance formula to this situation, we get
√[ (9)^2 + (12)^2 ] = √(81 + 144) = √225 = 15.
The distance between the two points is 15 units.
