Could anybody me out with linear functions, i need a better understanding of what they mean by this @ letter b.) i have everything else down, and just need to create a table after this step showing gas prices from 2005– 2015 for seattle wa, and houston tx.

like, when they ask what the slope how should i explain it?

Harold wrote this equation to model the level of water in a pool over time. the variable x represents time in hours. f(x) = 3,500 - 225x which statements about the situation are true? check all that apply. the water level is rising. the water level is falling. the initial level of water in the pool was 3,500 units. the initial level of water in the pool was 225 units. the pool was empty after 14 hours. the water was 2,600 units high after 4 hours.