Hi Ashley,
you need to know: 1) when two lines are parallel
they have the same slope
now , you have only one line so the line that is parallel with y=−54x+2 must be
Y - -54 x + b
if you had another information such as a point you could find b but now you find a family lines that are parallel with the given line.
please check your question and let me know if you have any question.
Minoo