How do you use the prediction equation to predict the missing value?

Being that the answers are in the back of my book, I don't seem to be getting the correct one. My prediction equation is correct: #y = 1.67x - 3269.64#

Please help in explaining how the answer to the missing value is: about 87 million enter image source here

1 Answer
Aug 10, 2016

Answer:

Substitute the year (#2010#) for the missing data in place of #x# in the predictor equation

Explanation:

Given
#color(white)("XXX")y=1.67x-3269.64#
where
#color(white)("XXX")y # is the number of households (in millions), and
#color(white)("XXX")x # is the year

For the year #color(blue)(2010)# this becomes
#color(white)("XXX")y=1.67 * (color(blue)(2010)) -3269.64#

#color(white)("XXXX")=3356.7 - 3269.64#

#color(white)("XXXX")=87.06#

So #y# (the number of households) is approximately #87# million.