Explanation:
this means that these 4 data ranges define 4 graphing charts with the given limits per coordinate axis.
the question is, which charts are large enough to show all data points of the defined process (50 ft uncoiled rope at time 0 is then coiled up 10 ft/sec., with the function graph showing the amount of still uncoiled rope over time in minutes).
the process will take 5 minutes (50 ft with 10 ft/min, so it will be completely coiled after 5 minutes) starting at 0 minutes.
the amount of uncoiled rope will go from 50 ft down to 0 ft.
so,
0 <= x <= 5 and 0 <= y <= 75 yes
0 to 5 minutes 0 to 50 ft all covered
0 <= x <= 10 and 0 <= y <= 50 yes
0 to 5 minutes 0 to 50 ft all covered
0 <= x <= 50 and 0 <= y <= 10 no
0 to 5 minutes covered 0 to 50 ft not covered
0 <= x <= 75 and 0 <= y <= 5 no
0 to 5 minutes covered 0 to 50 ft not covered