The straight line `(x-3)/3=(y-2)/1=(z-1)/0` is Parallel to x-axis Parallel to the y-axis Parallel to the z-axis Perpendicular to the z-axis

Explanation

We have given straight line `(x-3)/3=(y-2)/1=(z-1)/0`

Then direction cosine's of above line are

`a_1=(3,1,0)`

And direction cosine's of z-axis are

`a_2=(0,0,1)`

Then `a_1.a_2=(3,1,0).(0,0,1)`

`a_1.a_2=3 xx 0+1xx0+0xx1`

`a_1.a_2=0`

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