Posted by Hyde on Monday, March 31, 2014 at 7:57pm.
For the function y= (ax+b)/(cx+d) write the intervals where the function is increasing and intervals where it is decreasing.
X intercept= b/a
Y intercept= b/d
Vertical asymptote: x=d/c
Horozontal asymptote: a/c

Math  Reiny, Monday, March 31, 2014 at 8:08pm
your answeres are correct so far.
for the increasing/decreasing part,
find dy/dx
I got (c((ax+b) + a(cx+d))/(cx+d)^2
= (ad  bc)/(cx + d)^2
since the denominator is always ≥ 0
we only have to look at the top
for the function to increase , dy/dx > 0
ad  bc > 0
for the function to decrease,
ad  bc < 0
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