Answer:
Formula used :---
Distance between two points on a graph is √{(X-x)²+(Y-y)²}
Distance from J to K is :---
[tex] \sqrt{ {(- 3 + 8)}^{2} + {(5 + 7)}^{2}} \\ = \sqrt{ {5}^{2} + {12}^{2} } \\ = \sqrt{25 + 144} \\ = \sqrt{169} \\ = \boxed{13}[/tex]