.G1 label left "Population" "in Millions" left .2 label right "$x$ re-expressed as" "" \ "$space 0 left ( {date - 1600} over 100 right ) sup 7$" left 1.2 define newx { exp(7*(log(($1-1600)/100))) } ticks bot out at newx(1800) "1800", newx(1850) "1850",\ newx(1900) "1900" copy "usapop.d" thru { if $1 <= 1900 then { bullet at newx($1),$2 } } .G2