inverse.txt

set xrange[1:11]
set yrange[1:2.2]
plot 'inverse.dat' using (1/\$1):(1/\$2):(sprintf("(%2.1f, %2.1f)", \$1, \$2)) with labels point  pt 7 offset char 1,1 notitle

inverse.dat

0.1  0.5
0.4  0.6
0.2  0.8