Answer
Skew
Work Step by Step
The coefficients of the parameter give the direction of a line in a parametric equation.
Directional vector for line 1 is: $\lt1,-1,3\gt $ and for line 2 is: $\lt2,-2,7\gt$.
Both lines are not the same and they are not multiples of each other, so the lines are not parallel.
Thus, the lines are not intersecting (hence, skew).