Jim is standing beside a pool. he drops a weight from 4 feet above the surface if the water in the pool. the weight travels a total distance of 12 feet down before landing on the bottom of the pool. explain how you can write a sum of integers to find the depth of the water?

Treat the surface of the water as 0. The initial height of the weight was 4 ft above the surface of the water, therefore making it have an initial height of +4. If it travels 12 ft downward to hit the bottom of the pool, that means its height decreased by 12, so its falling is -12. To calculate the depth of the pool, use initial height minus drop distance, so 4 - 12. The depth of the pool is 8 ft.

Maybe the answer is 20mm. all i really did was just multiply, which is obvious.

I'm pretty sure it's b). i try drawing the functions out and b is the one that stands out or isnt a "line"