Prices of Homes The median price of a single-family home from 2001 to 2004...

Prices of Homes The median price of a single-family home from 2001 to 2004 can be approximated by

Where x= 0 corresponds to 2001 and x = 3 to 2004. (Source: U.S. Department of Commerce.)

(a) Interpret the slope of the graph of f.

(b) Estimate the years when the median price range was from $174,000 to $219,000.