Marty is using the two data points closest to the line to determine the equation of the regression line. What should Marty find for the slope of the line? Round to three decimal places.

Question

freemap · Answer

attachment

freemap · Answer

x	4	8	5.5	2	3.5	6	3.5	7.5	6	1.5
y	4	4	3.5	2	3.5	5	2	6	2.5	1

freemap · Answer

@Michele_Laino

freemap · Answer

each x is paired with the y

michele_laino · Answer

the line in the scatter plot is the best fit line?

michele_laino · Answer

from the graph, such line passes at point $(4,3)$ and at point $(6,4)$, so the requested slope is:
$$\Large  m = \frac{{4 - 3}}{{6 - 4}} = ...?$$

michele_laino · Answer

otherwise, another method, which can be applied to establish such slope, is to apply the specified formula, which comes from the least square method

michele_laino · Answer

do you remember the formula which gives the slope of the best fit line, and which uses the data you provided?