2D.+Regression+best-fit+line

This site will help to understand Regression, equations of lines with many data points. [|Please Click Me.]

Sample problem

The correlation coefficient is positive and the best estimate would be r=1.

Sample problem:


 * x || 0 || 1 || 2 || 3 || 4 || 5 || 6 || 7 ||
 * y || 280 || 295 || 322 || 395 || 425 || 471 || 511 || 548 ||



Two points appear to lie on the best fit line are (1,300) and (7,548). Then we need to find the slope using those points. m = 548-300/7-1=248/6=41.3 Next is point-slope form y-y=m(x-x) y-300=41.3(x-1) y=41.3x+259 This example came from the textbook.