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Figure 9.1 Relationship between compressive strength (y) and water/cement ratio (x)

Figure 9.1 Relationship between compressive strength (y) and water/cement ratio (x)

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Figure 9.2 Slopes and y-intercepts
for piecewise linear regression

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Figure 9.3 SAS piecewise linear
regression printout

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continued
on next slide
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Inc.

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continued
on next slide
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Inc.

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Figure 9.4 MINITAB graph of
reading scores

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Figure 9.5 MINITAB analysis of
straight-line model for reading score

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Figure 9.6 MINITAB graph of reading
scores, with quadratic model results

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Figure 9.7 SAS analysis of piecewise
linear model for reading score

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