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The Microbial Life project website has not been significantly updated since 2009. We are preserving the content here because it still contains useful content. But be aware that it may have out of date information.

Many suggest that students should first learn how to estimate the slope of a graph by hand before using a least squares linear regression routine. Students must first draw a straight line through their data that represents the linear trend of the data. They may want to draw three lines for: the best guess; the largest slope; and the smallest slope consistent with the data.

SlopeEstimateGraph

The links below provides basic guidelines for estimating the slope of a line.

  • Slope of a Straight Line is from Purple Math. This site is intended as an algebra review/tutorial but it is useful in that it has interactive practice examples for students to test their understanding.

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