Question 995653
Explain or define the variable, "b".
9x-Y=9 shows no b.



MAYBE you mean, b as in the typical format for slope-intercept equation y=mx+b.

In this case,  
{{{-Y=-9x+9}}}
{{{Y=9x-9}}}
and for any line perpendicular, slope is the negative reciprocal of  9;
which will be  {{{-1/9}}}.


b would be likely what you want as the y-axis  (or Y-axis) intercept, so your equation which you are finding is  {{{Y=-(1/9)x+3}}}.