Which mapping rule transfroms the unit circle to a circle having centre(1,-5) and radius4 ?
a)( x,y)--(1/4x-1,1/4y+5)
b)(x,y)--(1/4x+1,1/4y-5)
c)(x,y)--(4x-1,4y+5)
d)(x,y)--(4x+1,4y-5)