Plz help

What is the percent of increase for a population that changed from 438,000 to 561,000

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.

Given the following linear function sketch the graph of the function and find the domain and range. ƒ(x) = -5x + 4