One year ago, celeste was 4 feet 6 inches tall

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

I’m really confused and need to learn this

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation