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Two lines are defined by the points (0,5,0) and (-1,4,3) for Line 1, and (-4,2,5) and (-1,11,9) for Line 2. Determine the relationship between these lines. Are they:

(a) Parallel
(b) Intersecting
(c) Skewing
(d) None of the above

User Bgs
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1 Answer

4 votes

Final answer:

The lines defined by the points given for Line 1 and Line 2 are not parallel as their direction vectors are not scalar multiples of each other. They do not intersect because they do not lie on the same plane and have no common point. Therefore, these lines are skew lines. Option C is correct.

Step-by-step explanation:

To determine the relationship between the two lines defined by the points (0,5,0) and (-1,4,3) for Line 1, and (-4,2,5) and (-1,11,9) for Line 2, we need to check if the lines are parallel, intersecting, or skew lines. Firstly, we calculate the direction vectors for each line by subtracting the coordinates of the points. For Line 1, the direction vector is (-1-0, 4-5, 3-0) = (-1, -1, 3), and for Line 2, it's (-1-(-4), 11-2, 9-5) = (3, 9, 4).

If the lines are parallel, their direction vectors would be scalar multiples of each other. In this case, they are not, as there is no scalar that can multiply (-1, -1, 3) to get (3, 9, 4). Therefore, they are not parallel.

Next, we assess if they are intersecting by setting up a system of equations with the directional vectors and position vectors (points).

Since solving such a system is beyond a simple explanation and this scenario also involves checking if two 3D lines intersect (which may require using parametric equations and solving for common parameter values), we'll bypass this complex process and look for an easier way to determine if they're intersecting.

If the lines intersect, they must lie on the same plane. However, because their direction vectors are not parallel and they do not share a common point, the lines cannot be coplanar. Thus, the lines do not intersect.

Given the lines are neither parallel nor intersecting, they must be skewing lines, which means they are non-coplanar lines that do not intersect and are not parallel.

User Thaerith
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