Warning: when printing, resize your plots to be smaller than the default. Test print to a pdf file before printing to a printer!
for f(x)=ln(x):
	goes to infinity to as x->infinity
	goes to -infinity as x->0 from right
	continuous, strictly increasing, concave down on its domain (0,infinity)
	ln(1)=0.
	ln(2)>1/2
	ln(16)=ln(2^4)=4*ln(2)>2.

Plot[{Log[x],1},{x,0,10},PlotRange->{-1,3}]