A furniture manufacturer sells build-it-yourself armchair kits which contain one seat, four legs, two arms, and one back. How many complete kits can be produced from 139 seats, 496 legs, 240 arms, and 130 backs

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.