Which graph best shows the situation?

answer:

the second one

answer:

the second graph is the right graph

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative

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.