Question 1174624
<pre>
Equations of parallel lines need differ only by their constant term(s).

y = 2x-7 has only the constant term -7.  Substitute any letter for the constant
term, say b.

y = 2x+b

Now all we need do is substitute the point (5,-1) in it

 -1 = 2(5)+b
 -1 = 10+b
-11 = b

Substitute 11 for b in

y = 2x+b and get

y = 2x-11     <--answer

Edwin</pre>