In Order for Applicants to Work for the Foreign-Service Department

question 67

Multiple Choice

In order for applicants to work for the foreign-service department, they must take a test in the language of the country where they plan to work. The data below shows the relationship between the number of years that
Applicants have studied a particular language and the grades they received on the proficiency exam. Find the
Equation of the regression line for the given data. $$\begin{array} { l | c | c | c | c | c | c | c | c | c | } \text { Number of years, } \mathrm { x } & 3 & 4 & 4 & 5 & 3 & 6 & 2 & 7 & 3 \\\hline \text { Grades on test, } \mathrm { y } & 61 & 68 & 75 & 82 & 73 & 90 & 58 & 93 & 72\end{array}$$

• A) \(\hat { \hat { y } }\) = 6.910x + 46.261
• B) \(\hat { \mathrm { y } }\) = 6.910x - 46.261
• C) \(\hat { \mathrm { y } }\) = 46.261x - 6.910
• D) \(\hat { \mathbf { y } }\) = 46.261x + 6.910

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Definitions:

Basketballs

Inflated balls used in the game of basketball, designed according to specific regulations in terms of size and weight.

MC

The additional cost of producing one more unit of a product or service.

TVC

Total Variable Cost, which refers to the total of all costs that vary with output level in the short term.

Formula

A mathematical relationship or rule expressed in symbols, often used to calculate and predict outcomes.