Here is what I made. I can't seem to get the lines to be thicker.
My script (without my failed attempts at increasing line thickness):
My script (without my failed attempts at increasing line thickness):
set terminal png color
set xlabel "Speed (MHz or rating)"
set ylabel "Cost ($USD)"
set title "Speed vs. Cost"
set grid
set time
set linestyle 1 lw 3
plot "XP.dat" using 2:1 title "XP" with linespoints, \
"XP333.dat" using 2:1 title "XP333" with linespoints, \
"celeron.dat" using 2:1 title "celeron" with linespoints, \
"MP.dat" using 2:1 title "MP" with linespoints