Suppose that the consumer price index (cpi), which measures the cost of a typical package of consumer goods, stood at 135.1 in 1990 and 175.1 in 2000. let x equal 0 correspond to 1990, and estimate the cpi in 1996 and 2005. (assume that the data can be modeled by a straight line.)which linear equation best models the cpi? o a y= -5x+ 121.8 b. y= 5x -121.8 c. y= 5x+121.8 in 1996, the cpi would be approximately (type an integer or a decimal in 2005, the cpi would be approximately type an integer or a decimal)