A Theater Has 35 seats in the first row, 38 seats in the second row, 41 seats in the third row, and so on. How many seats are there in row 19?

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.