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# Vector Q C4 watch

1. Why can the direction vector not be (008)? It makes more sense because they've told us that the point on the line is (4,-3,8) and as it is parallel to the z axis, you would expect no inclination. Therefore the line must be consistently going to (008)?

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2. (Original post by ps1265A)

Why can the direction vector not be (008)? It makes more sense because they've told us that the point on the line is (4,-3,8) and as it is parallel to the z axis, you would expect no inclination. Therefore the line must be consistently going to (008)?

Posted from TSR Mobile
There is only one point on the line where z = 8, at (4, -3, 8). Also, for all points, x = 3, y = -3, so it cannot possibly go through (0, 0, 8).

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