Question: The above figure is a time series plot for a monthly data: a) From the graph, what can you say about this time series

a) From the graph, what can you say about this time series

The above figure is a time series plot for a monthly data: a) From the graph, what can you say about this time series data? b) What model(s) do you suggest for forecasting y 600 500- 400 300 200 100- 1 13 26 Time Series Plot of y 39 52 65 78 Index 91 104 117 130

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