Given f(x)=ax+bcx+df(x) = \frac{ax+b}{cx+d}f(x)=cx+dax+b, what is the horizontal asymptote?
y=a/cy = a/cy=a/c
y=−d/cy = -d/cy=−d/c
x=−d/cx = -d/cx=−d/c
y=b/dy = b/dy=b/d