find a set of parametric equations for the line that passes through the given points.

(-9, 5, 1), (2, -3, 8)

consider the parameter t such that when t=0 you are at the first point, and when t=1 you have moved to the 2nd point.

For x, the would be x = x1 + (x2-x1)t

x = -9 + (2-(-9))t

and similarly for y and z.