It Is Thought That Prehistoric Indians Did Not Take Their $\begin{array} { c | c c c c c } x & 5.75 & 6.75 & 7.25 & 7.50 & 8.25 \\\hline y & 69 & 60 & 92 & 92 & 94 \\\hline\end{array}$

question 4

Multiple Choice

It is thought that prehistoric Indians did not take their best tools, pottery, and household items when they visited higher elevations for their summer camps. It is hypothesized that archaeological sites tend to lose their cultural identity and specific cultural affiliation as the elevation of the site increases. Let x be the elevation (in thousands of feet) for an archaeological site in the southwestern United States. Let y be the percentage of unidentified artifacts (no specific cultural affiliation) at a given elevation. Suppose that the following data were obtained for a collection of archaeological sites in New Mexico: $\begin{array} { c | c c c c c } x & 5.75 & 6.75 & 7.25 & 7.50 & 8.25 \\\hline y & 69 & 60 & 92 & 92 & 94 \\\hline\end{array}$ Find a for the equation of the least-squares line .
$\hat { y } = a + b x$

• A)-12.913
• B)-0.017
• C)0.001
• D)0.017
• E)12.913

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Definitions:

Thick Beaks

A characteristic of some birds that have evolved robust, heavy beaks to crush or crack hard food sources.

Chyme

Mix of food and gastric fluid.

Large Intestine

Organ that receives digestive waste from the small intestine and concentrates it as feces.

Mouth

The opening in an animal's body that is the beginning of the digestive tract, through which food is ingested.