Not sure if this is the correct forum, but here goes...

Write the equation of the given circle or straight line in complex notation:

a) The straight line through 1 and -1-i

b) The vertical line containing -3-i

c) The circle through 1, i and 0

I don't necessarily need you guys to work these out for me. I assume there must be formulas to following when working with lines and circles but I can't find anything in my notes or book. Please HELP!! Thanks.