Question 384080
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Hi,         
Note: Standard form of an Equation of a Circle is {{{(x-h)^2 + (y-k)^2 = r^2}}}
where Pt(h,k) is the Center and r the radius.
circle with Center At (-8,-7), tangent to y-axis. r = 8
     {{{(x+8)^2 + (y+7)^2 = 64}}}
{{{drawing(500,500, -15,5,-15,5,grid(1),circle(-8,-7,8), circle(-8,-7,.15), line(-8,-7,0,-7),locate(-8,-7,C),locate(-4,-7,r))}}}