Question 924716
Rule: The equation of a line wit slope m and passing through the point (x1,y1) 
is given by
              {{{ y-y1 =m(x-x1)}}}
           point (x1,y1)= (3,-2)
the line is parallel to y=7
       y= 7 is a horizontal line
hence slope  =0
 hence  m =0
put this values in the above equation
       {{{(y-(-2))=0(x-3)}}}
           {{{(y+2) =0}}}
            {{{ y+2 = 0}}}
             move 2 to the right
                 {{{ y= -2}}}
the equation you are looking for is   y =-2