If i= sqaure root of -1, what is the value of i^3?

Anyone know? will mark brainliest if you're correct!

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.

Can someone me with this problem i don't understand i need