You need to identify the direction vectors of the lines such that:

barv_1 = <2,-6,4> , barv_2 = <-1,3,-2> , barv_3 = <1,-3,2>, barv_4 = <2,-3,1>

You need to remember that two vectors are parallel if the coressponding components of both vectors are in the same ratio.

Checking if the vectors `barv_1` and `barv_2` are parallel yields:

`2/(-1) = (-6)/3 = 4/(-2)`

`-2 = -2 = -2`

The same ratio proves that the vectors `barv_1` and `barv_2` are parallel.

Checking if the vectors `barv_1` and...

(The entire section contains 228 words.)

## Unlock This Answer Now

Start your **48-hour free trial** to unlock this answer and thousands more. Enjoy eNotes ad-free and cancel anytime.

Already a member? Log in here.