Kate's soccer team is selling coupon books and recipe books to raise money for transportation to their games. Coupen books cost $12 each
and recipe books cost $7.50 each. If Kate sold a total of 42 books and
raised $441, how many coupon books did she sell?

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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.

did you get the answer?