The line of best fit does not have to pass through the 0 (origin) and rarely does
The line of best fit is simply the line that shows the general direction of the graph. The trick is to make the line go through as many points on the graph as possible. Some scatter plots have no line of best fit.
Not necessarily. Often it is, but the line of best fit is simply an equation that closely matches the results. Therefore any line could be a line of best fit, linear, quadradic, or even cubic! The sky (and the results) are the limit.
The best fit line is basically the average of a graph; it represents where, when, etc. the majority of the event occurred.
Data points that are not close to the line of best fit are called outliers.
The line of best fit does not necessarily have to start from 0. It depends on the data and the model being used. In some cases, the intercept (where the line crosses the y-axis) can be a meaningful value, and in those cases, the line may not start from 0.
The line of best fit does not have to pass through the 0 (origin) and rarely does
Yes but phrased differently
the whole sum is messed up * * * * * You get a line of "best fit" whose gradient is zero. The correlation coefficient and the covariance are statistically no different from zero.
The line that minimized the sum of the squares of the diffences of each point from the line is the line of best fit.
A line of best-fit.
Because the "best fit" line is usually required to be a straight line, but the data points are not all on one straight line. (If they were, then the best-fit line would be a real no-brainer.)
What is the difference between a trend line and a line of best fit
Finding the line of best fit is called linear regression.
A best-fit line is the straight line which most accurately represents a set of data/points. It is defined as the line that is the smallest average distance from the data/points. Refer to the related links for an illustration of a best fit line.
Check out the related links section below to see an example of a line of best fit.
The line of best fit is simply the line that shows the general direction of the graph. The trick is to make the line go through as many points on the graph as possible. Some scatter plots have no line of best fit.