The first measure is the mean, which means average. To calculate the mean, add together all of the numbers in your data set. Then divide that sum by the number of addends.
Another measure of central tendency is the median, which is the middle number when listed in order from least to greatest.
The mode is another measure of central tendency that tells us the number that occurred the most often in your data set. When looking for the mode, there can be more than one mode or no mode. The mode can tell us the most popular choice.
[y] = [- 4- 4x + x2]?
numerator is the top of the number while denominator is the below of the number.