E. Z-chart

Explanation:

1. A Z-chart, also known as a time series chart or line graph, is the correct type of graph used to plot a time series. It shows how a variable changes over time, with time on the x-axis and the variable’s values on the y-axis.
2. A Histogram is used to show the frequency distribution of continuous data, not time series data.
3. An Ogive is a cumulative frequency graph, typically used to find medians and percentiles.
4. A Pie chart is used to show the proportion of different categories in a whole, not for time series data.
5. “Historigram” is not a standard term in statistics. It appears to be a misspelling or confusion with “histogram”.

The Z-chart (or time series chart) is the most appropriate for plotting time series data as it clearly shows trends, patterns, and fluctuations over time. It’s commonly used in business and economics to display data such as sales figures, stock prices, or economic indicators over time periods.