Equation of a line is given by $y=ax+b,$ if a line is drawn parallel to this line,which of the following can be its equation.

Question

$\begin{array}{1 1} (a)\; y=-ax+c \\ (b)\; y = \frac{1}{a}x+c \\(c)\;y=\frac{-1}{a}x+c \\ (d)\; y=ax+c \end{array}$