Why is it that there is a jagline in a histogram?

A jagged line in a histogram typically occurs due to the presence of a limited number of data points or uneven distribution of data. When the data is binned into intervals, variations in frequency can create sharp peaks and troughs, leading to a jagged appearance. Additionally, if the bin width is too small relative to the data set size, it can exaggerate these fluctuations. Ensuring a sufficient sample size and appropriate bin width can help create a smoother, more representative histogram.