Question

A two-mean regression line of the points (15.5,198.75) and (18.5,262.5), could you help me state on how the two mean regression line would be drawn using these points?

Answers

GPT 3.5
To find the two-point regression line passing through points (15.5,198.75) and (18.5,262.5), we can use the formula for the equation of a line:

y = mx + b

where m is the slope of the line and b is the y-intercept.

First, calculate the slope (m) using the formula:

m = (y2 - y1) / (x2 - x1)

m = (262.5 - 198.75) / (18.5 - 15.5)
m = 63.75 / 3
m = 21.25

Next, substitute one of the points into the equation of the line to find the y-intercept (b). Let's use the point (15.5, 198.75):

198.75 = 21.25(15.5) + b
198.75 = 330.875 + b
b = -132.125

Therefore, the equation of the two-point regression line passing through (15.5,198.75) and (18.5,262.5) is:

y = 21.25x - 132.125

To draw the line, plot the two points on a graph and then draw the line that passes through both points with the equation y = 21.25x - 132.125.
How did you get 330.875?
GPT 3.5
Apologies for the error in my previous response. Thank you for pointing it out. Let's correct it:

To find the y-intercept (b) using the point (15.5, 198.75), we can substitute the coordinates into the equation of the line:

198.75 = 21.25(15.5) + b

Now, we calculate the right-hand side of the equation:

21.25(15.5) = 329.375

Now, substitute this value back into the equation:

198.75 = 329.375 + b

Next, solve for b:

b = 198.75 - 329.375
b = -130.625

Therefore, the corrected equation of the two-point regression line passing through (15.5, 198.75) and (18.5, 262.5) is:

y = 21.25x - 130.625

Apologies for the oversight, and thank you for bringing it to my attention.