The Following Are Costs of Advertising (In Thousands of Dollars)and $\begin{array} { c | r r r r r r r r } Cost & 9 & 2 & 3 & 4 & 2 & 5 & 9 & 10 \\\hline Number & 85 & 52 & 55 & 68 & 67 & 86 & 83 & 73\end{array}$

question 50

Multiple Choice

The following are costs of advertising (in thousands of dollars) and the numbers of products sold (in thousands) : $\begin{array} { c | r r r r r r r r } Cost & 9 & 2 & 3 & 4 & 2 & 5 & 9 & 10 \\\hline Number & 85 & 52 & 55 & 68 & 67 & 86 & 83 & 73\end{array}$
The equation of the regression line is $y = 2.78846 x + 55.7885$ . Find the coefficient of determination.

• A) \(0.2353\)
• B) \(0.5009\)
• C) \(0.7077\)
• D) \(- 0.0707\)

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Definitions:

Aerobic Exercise

Physical activity that improves cardiovascular health by elevating heart rate and increasing the body's use of oxygen.

Lung Fitness

The health and performance capability of the lungs, impacting overall respiratory function and physical stamina.

Depression

A mental health disorder characterized by persistent feelings of sadness, hopelessness, and a lack of interest or pleasure in activities.

Endorphin Production

The process by which the body generates endorphins, natural painkillers, and pleasure enhancers, often in response to stress or exercise.