Consider the line L$($t$)=4$t$,3$t$1,5.$ Then:

$$L is$$

$?$parallelperpendicularneither

to the plane $6$x$+4\mathrm{.}5$y$=4\mathrm{.}5$

$$L is$$

$?$parallelperpendicularneither

to the plane $8$x$+6$y$=48$

$$L is$$

$?$parallelperpendicularneither

to the plane $16$y$12$x$+10$z$=100$

$$L is$$

$?$parallelperpendicularneither

to the plane