Would the right answer here be 0?

Which is an equation for the nth terms of the sequence 12,15,18,21

which  best  describes the transformation from the graph of  f(x) =  x2  to the graph of  f(x) = (x  – 3)2  – 1?   left 3 units, down 1 unitleft 3 units, up 1 unitright 3 units, down 1 unit  right 3 units, up 1 unit

Question 5 spring semester final exam math evaluate