Question

The boiling point of water was measured at different locations of varying barometric pressures. A regression line of the data is1.9x + 155.3, where y is the boiling point in degrees Fahrenheit and is the pressure in inches of mercury.Which statement best describes the meaning of the slope in the regression line?

Answer 1

the slope represents:

`\frac{change\text{ }in\text{ y variable}}{change\text{ }in\text{ x variable}}`

in this case

`(1.9)/(1)=1.9\text{ }`

this is, The boiling point increases by 1.9° F for every inch of mercury the pressure increases, therefore:

answer: A.