Raymond B. answered 3d
Math, microeconomics or criminal justice
ir you meant y = 6x +6
then y = 6x + b where b = any number other than 6, such as y = 6x +5
then that's a parallel line, same line shifted down one unit
but if you meant y = 6/x +6
you want another hyperbolic curve with same derivative y'=-6/x^2 = the slope
such as y = 6/x + 5, same hyperbola, just shifted down one unit
or if you really meant y = 6/1 +6
that's same as y = 6+6
and y = 12
parallel lines are y=11 or y=b where b = any number other than 12
i.e. any other flat horizontal line with slope = 0