Using the Graphing
Calculator in Algebra I
Page 1: Clearing Memory
Page 2: Functions, Solving Systems of Equations
Page 3: Statistics, Entering List(s), 1 Variable Statistics
Page 4: Box Plots, Histograms
Page 5: 2 Variable Statistics, Scatterplots,
Page 6: Regressions
Page 7: Residual Plots
Page 8: NY State expectations when using the graphing calculator
Clearing Memory:
Required before the calculator can be used for any exam.
Return the calc to default settings.
Be sure you are clearing ALL Memory:
1
Functions:
Enter the function
Change/view the
window
View the table
Finding Roots of a function: Enter function
Use
and
,
to choose left/right bounds and guess
Solving Systems of Equations:
Enter functions using
Use
and
to choose the functions and guess.
2
View the graph
Statistics:
Enter Data:
Calculating 1-Var Statistics (Mean, Median, Std Dev etc…)
Between the two “enters”, you can name the List, if
you have more than one entered. The default is List 1.
Mean
Sum of values
The Five Number Summary
Standard Deviation for a Sample
Standard Deviation for the population.
3
Box-whisker plots, histograms, etc…
Turn on StatPlots and choose type
Types:
Scatterplot
Histogram
Box Plot (with outliers)
Box Plot
to view Plot
Box-Plot
Histogram
Use Trace to note specific values on graph:
To adjust intervals for Histograms, adjust the window:
Xmin= lower boundary of 1st interval
Xmax= Upper boundary of last interval
Xscl= Interval width
4
2-Variable Statistics
Enter data into 2 Lists
Turn on StatPlots and choose type
Types:
Scatterplot
Scatterplot
5
Turn Diagnotics On (to show correlation coefficient)
Scroll to:
Regressions:
Linear 4:
Quadratic 5:
Exponential 0:
Power A:
Linear
Quadratic
Exponential
Power
6
Construction of residual plot:
Turn on StatPlot
Select “On”, under “Type” choose the first (scatter plot) icon, for Xlist enter L1, for Ylist enter
RESID, and under “Mark” choose the first (square) symbol.
“RESID” is accessed by pressing 2nd, LIST, 7
Analyze residual plots
http://stattrek.com/regression/residual-analysis.aspx
.
7
http://pages.central.edu/emp/LintonT/ti83/html/regression.html (animation of least squares for
linear regression)
8