Could someone help me answer this please?

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample