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.
The mean and mode are highly sensitive to outliers. What this means is that the presence of an outlier will dramatically affect both of these measures of the center. One advantage of the median is that it is not influenced as much by an outlier. To see this, consider the data set 3, 4, 5, 5, 6.