Suppose that the consumer price index (CPI), which measures the cost of a typical package of consumer goods, stood at 133.5 in 1990 and 153.5 in 2000. Let x =0 corresponds to 1990 and estimate the CPI in 1995 and 2005.
(Assume that the data can be modeled by a straight line.)
Which linear equation best models the CPI?
a.) y= -2x + 133.5
b) y= 2x - 133.5
c) y= 2x + 133.5
In 1995, the CPI would be approximately?
In 2005, the CPI would be approximately?