Which equation is the image of y=3^x under the mapping rule (x,y)--(1/2x-1,2y+3)?
a)1/2(y-3)=3^(2x+1)
b)1/2(y-3)=3^1/2(x+1)
c)1/2(y-3)=3^2(x+1)
d)2(y-3)=3^2(x+1)