Answer:
[tex] \sqrt{145} [/tex]units
Step-by-step explanation:
Distance between 2 points
= [tex] \sqrt{(x1 - x2)^{2} + (y1 - y2)^{2} } [/tex]
Thus distance between (-2, -1) and (6, 8)
[tex] = \sqrt{ {(6 + 2)}^{2} + (8 + 1)^{2} } \\ = \sqrt{8^{2} + 9^{2} } \\ = \sqrt{145} \: units[/tex]