Let X Be the Area (In Square Feet) to Be

question 149

Short Answer

Let x be the area (in square feet) to be covered with blacktop and let y be the time (in minutes) it takes a construction crew to completely cover the area. The simple linear regression model relates x and y where the least squares estimates of the regression parameters are b = 0.207 and a = 81.6.
What is the least-squares best-fitting regression line? = ______________
What is the estimated amount of time it takes to apply 2400 square feet of blacktop?
______________ (minutes)
What is the average change in time per one square foot increase in area?
______________ (minutes)

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Definitions:

Energy

Capacity to do work and bring about change; occurs in a variety of forms.

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The layers of gas surrounding a planet, held in place by gravity, and composed of various gases that protect and sustain life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention, and reducing temperature extremes between day and night.

Photosynthesis

The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

Cellular Respiration

Metabolic reactions that use the energy from carbohydrate, fatty acid, or amino acid breakdown to produce ATP molecules.