Consider the Plane $\vec { r } ( s , t ) = ( 2 + s - 4 t ) \vec { i } + ( 5 - s + 4 t ) \vec { j } + ( 6 - 4 t - s ) \vec { k }$

True/False

Consider the plane $\vec { r } ( s , t ) = ( 2 + s - 4 t ) \vec { i } + ( 5 - s + 4 t ) \vec { j } + ( 6 - 4 t - s ) \vec { k }$ Does it contain the point (1, 6, -1)?