reset
set border
set xtics autofreq
# set ytics 1
set grid
set xzeroaxis lt 9 lw 2
set yzeroaxis lt 9 lw 2
set style line 1 lt -1 lw 3
set style line 2 lt 5 lw 3
set style line 3 lt 12 lw 3
set xrange [0:10]
set yrange [0:1]
# set samples 1000
# set key off
f(x)=(0.5+0.9*(x-1))/(1+0.9*(x-1))
g(x)=x**2+32*x+260
h(x)=-4+sqrt(x+16)
plot f(x) ls 2
# plot f(x) ls 1,g(x) ls 2, h(x) ls 3   
#
# Maxima commands
#
#(%i1) divide(100+60*x,1+0.04*x);
#`rat' replaced 0.04 by 1//25 = 0.04
#(%o1) 			        [1500, - 1400]
#(%i2)