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The boiling point of water was measured at different locations of varying barometric pressures. A regression line of the data is y equals 1.9 x + 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 ° Fahrenheit.

B.For every 1 inch of mercury the pressure increases, the boiling point is expected to increase by 155.3 ° Fahrenheit.

C.For every 1.9 inches of mercury the pressure increases, the boiling point is expected to increase by 1.9 ° Fahrenheit.

D.For every 1.9 inches of mercury the pressure increases, the boiling point is expected to increase by 155.3 ° Fahrenheit.

 Oct 8, 2019
 #1
avatar+104962 
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The slope represents   

 

change in y variable

________________

change in x variable

 

So....in this case 

 

1.9

___     means that

  1

 

The boiling point increases by 1.9° F  for every inch of mercury the pressure increases  ....so..."A"  is correct

 

 

 

cool cool cool

 Oct 8, 2019
edited by CPhill  Oct 8, 2019

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