Using Blackline Master 9.2

To find the best-fitting quadratic curve (y = ax2 + bx + c) for the data, press

+

STAT , touch D REG, double touch 04 Rg_x2, and press ENTER . The following values for the regression will appear:

To view the overlay of the regression curve and the scatter diagram, press Y= CL VARS , touch H STAT, press ENTER , touch B REGEQN, double touch

1 RegEqn, and press GRAPH . The following overlay will be displayed:

Notice, the r 2 value for the quadratic regression model is about .9337, whereas the r 2 value for the exponential regression model was .9786. The exponential regression model (with the r 2 value closer to 1) is considered the better-fitting model. The exponential regression model even fits better than the linear model with an r 2 value of .8553. The students should continue this analysis with the remaining regression models.

Other Regressions and Model of “Best Fit”/STATISTICS USING THE SHARP EL-9600

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Sharp EL-9600 manual Using Blackline Master