When considering the line of best fit for any scatter plot, the following statements are true:
- The line of best fit can, sometimes, be used as a prediction tool; showing a trend in the data.
- The line must represent the general relationship between the two variables.
The other statements are not necessarily true:
- The line of best fit must have an equal number of points above and below the line. (Not true; while it's a desirable characteristic in some cases, it's not a requirement.)
- The line of best fit should be an exact representation of the data points. (Not true; the line represents a trend and may not go through all points.)
- The line of best fit MUST cross through at least 2 points in the scatter plot. (Not true; the line is often determined by a mathematical method such as least squares, and may not pass through any specific points in the data set.)
So, the correct statements regarding the line of best fit are the first and last options.