Answer
Skew
Work Step by Step
The coefficients of the parameter gives the direction of a line in parametric equation.
Directional vector for line 1 is: $\lt1,-1,3\gt $ and for line 2 is: $\lt2,-2,7\gt$.
Both the lines are not the same neither are they multiples of each other so the lines are not parallel.
Thus, the lines are not intersecting hence, are skew.
