The boiling point of water was measured at different locations of varying barometric pressures. A regression line of the data is y = 1.9x + 155.3, where y is the boiling point in degrees Fahrenheit and x is the pressure in inches of mercury.
Which statement best describes the meaning of the slope in the regression line?
A. For every 1 inch of mercury the pressure increases, the boiling point is expected to increase by 1.9 °F.
B. For every 1 inch of mercury the pressure increases, the boiling point is expected to increase by 155.3 °F.
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C. For every 1.9 inches of mercury the pressure increases, the boiling point is expected to increase by 1.9 °F.
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D. For every 1.9 inches of mercury the pressure increases, the boiling point is expected to increase by 155.3 °F.
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