A company's annual sales are shown below in thousands of dollars for a period of 10 years. 
Plot the time series; find the linear regression model, and also the forecast value and error for each of the years. Also discuss whether you think a linear model appears to be appropriate.
Definitions:
Open-Ended Questions
Questions formulated to elicit responses that are more elaborate and comprehensive, encouraging a detailed answer.
References
Citations or mentions of authoritative sources used to support assertions or provide evidence in a written work.
Empathetic Listening
A listening style in which the listener tries to understand the speaker's feelings, thoughts, and viewpoint without judgment.
Non-Evaluative Feedback
Feedback that describes observations objectively without judgment or recommendations, allowing individuals to draw their own conclusions for improvement.
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