Select all explanations that prove triangle abc is congruent to triangle abc

rotation around a ans then reflect over ab

translate abc to the right and reflect over a horizontal line

dilate by a scale factor of 2 centered at point b

Abby is collecting rainfall data. she finds that one value of the data set is a high-value outlier. which statement must be true? abby will use a different formula for calculating the standard deviation. the outlier will increase the standard deviation of the data set. the spread of the graph of the data will not change. abby will not use the mean when calculating the standard deviation.