Question

Choose the Standard Form of the equation y = −1/5x − 5.

Answer 1

Nope.

5y = - x - 25 => 5y + x + 25 = 0

Answer 2

See http://en.wikipedia.org/wiki/Linear_equation#Standard_form
As you can see, there are many forms (arrangements of the equation)
Standard form for this equation is
\[ x+5y= -25 \]
which matches Ax+By= C
A , B and C are integers
A is positive.