Find the values of k for which the line ...

Find the values of k for which the line `(k - 3) x - (4 - k^(2)) y +k^(2) - 7k + 6 = 0 ` is
(a) Parallel to the x-axis,
(b) Parallel to the y-axis,
(c) Passing through the origin.

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The correct Answer is:

`(a)3, (b) pm 2, (c ) 6 " or " 1`

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