The table gives the number *N* (*t*), measured in thousands, of minimally"

invasive cosmetic surgery procedures performed in the United States for various years *t*.*t * *N*(*t*) (thousands)

2000 5, 500

2002 4, 897

2004 7, 470

2006 9, 138

2008 10, 89

2010 11, 561

2012 13, 035

*Source*: American Society of Plastic Surgeons

(a) What is the meaning of *N*' (*t*)? What are its units?

(b) Construct a table of estimated values for *N*' (*t*) .

(c) Graph *N* and *N*'.

(d) How would it be possible to get more accurate values for *N*'(*t*)?

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