, Then the Y-Intercept of the Least-Squares Regression Line Is $$\text { If } \bar { Y } = 21 , \bar { X } = 6 \text {, and } b = + 1.5 \text {, }$$

question 46

Multiple Choice

, then the Y-intercept of the least-squares regression line is $$\text { If } \bar { Y } = 21 , \bar { X } = 6 \text {, and } b = + 1.5 \text {, }$$ .

• A)+30.0
• B)-12.0
• C)+12.0
• D)-30.0

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Definitions:

Photochemical Smog

A type of air pollution created when sunlight reacts with nitrogen oxides and at least one volatile organic compound in the atmosphere.

Volatile Organic Compounds

Organic chemicals that have a high vapor pressure at ordinary room temperature, making them significantly evaporative and potentially harmful to the environment and human health.

Sunlight

The natural light emitted by the Sun, providing energy that supports the majority of life on Earth through photosynthesis.

Primary Pollutant

A contaminant released directly into the atmosphere from identifiable sources, contributing directly to air pollution.