The sterplot shows the relationship between two variables, x and y . A line of best fit is also shown.

Question

The sterplot shows the relationship between two variables, $x$ and $y$ . A line of best fit is also shown.

Which of the following is closest to the slope of this line of best fit?

Accepted Answer

Choice B is correct. A line in the xy -plane that passes through points x 1 , y 1 and x 2 , y 2 has a slope of y 2 - y 1 x 2 - x 1 . The line of best fit shown passes approximately through the points 0 , 14 and 13 , 0 . It follows that the slope of this line of best fit is approximately 0 - 14 13 - 0 , or - 14 13 . Of the given choices, - 1.1 is closest to - 14 13 . Choice A is incorrect and may result from conceptual or calculation errors. Choice C is incorrect and may result from conceptual or calculation errors. Choice D is incorrect and may result from conceptual or calculation errors.

Question the-st