Joyce received an Amazon gift card for $250. Each month she uses the card to buy books that cost $15 each. Write an equation to represent the amount of money on the card after each month. Use x to represent the number of months, use y to represent the amount of money on the card.

4.08%

step-by-step explanation:

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.