Red and yellow creates orange. Yellow and blue creates green. The secondary colors can be mixed further to create additional shades. Tertiary colors are the result of a primary and secondary color mixed together. For example, orange mixed with red creates red-orange.
An influential point is an outlier that greatly affects the slope of the regression line. One way to test the influence of an outlier is to compute the regression equation with and without the outlier. This type of analysis is illustrated below.
In this particular data set, the mean, median, and mode are all 22. The value of 8 is an outlier, since it appears to be substantially less than the other values. The median does not change for the new data set, since two of the new data items are greater than the median and two are less than the median.