pls pls help i’ll mark brainliest quickly!!!
Part A: The number of cubic feet of water, y, in a pool 2 hours after the water starts flowing into the pool is a linear function. The points (40,3000) and (60,4000) lie on the line of the function. Calculate the slope of the line.

Part B: What does the slope of the line represent in Part A? Explain in your own words and use compete sentence.

Part C: Explain how the slope formula is related to the definition of slope. Use complete sentences.