For n=30 drivers, the driver's age and the maximum distance at which the driver can read a highway sign at night.
signdist
'data.frame': 30 obs. of 2 variables: $ Age : int 18 20 22 23 23 25 27 28 29 32 ... $ Distance: int 510 590 560 510 460 490 560 510 460 410 ...
https://oli.cmu.edu/jcourse/workbook/activity/page?context=434b8b4980020ca60017028aafe3258a
plot(Distance ~ Age, data = signdist)