Question

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

Answer 1

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.