Why is the equation of the line of best fit incorrect?

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Sakusan Puwanendran
Sakusan Puwanendran 2017-10-14
编辑： Matt J 2017-10-14
I've projected a line of best fit using the linear basic fitting option onto my graph.Why does the equation of the line have a y-intercept of -30 when it clearly crosses the Y-axis at -5.5? Attached is m graph.

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Matt J
Matt J 2017-10-14
编辑：Matt J 2017-10-14
Your graph doesn't show the y-intercept. The x-axis range starts at 1900, rather than zero.

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