The results of an experiment that Lacey is doing are recorded in the table below. DayNumber of Amoeba
12*1
22*2
32*3
How many amoebas will be present on the fourth day?

4
6
2
16

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

How to do this , and can some one explain

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?