What can be the equation of the line whose slope is $\large\frac{1}{7}$ and $y$ intercept $ 6 $?

Question

$\begin{array}{1 1} (a)\;y=7x-42 \\ (b)\; x+7y-6=0 \\ (c)\;x-7y+42=0 \\ (d)\;x=\frac{1}{7}y+6 \end{array}$