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TI-85 It is possible to enter data while in the statis-
tics mode of your calculator. However, the examples
in this Guide assume that input data is already en-
tered in list L
and output data is in list L
1
Press
STAT
F1
menu to enter L
Press
ENTER
Choose the linear model with
The y-intercept, a, and the slope, b, of the model is
displayed along with the number, n, of data points.
(The corr that is shown is called the correlation
coefficient. It is something you will learn about in a
statistics course and should be ignored in this course.)
TI-86 Press
2nd
To have the calculator find the linear model of best
fit using L
as the input and L
1
the model into the y(x)= list, put the following after
the LinReg instruction:
the input and output list names either by typing them
from the keyboard or by pressing
(
), press the menu key under L
NAMES
press the menu key under L
. (The model will be pasted into the location that
ENTER
you specify.)
The linear model of best fit for the aligned tax data
entered in Section 1.4.4 of this Guide is displayed on
the home screen.
Note: It is not necessary to first clear any previously-
entered function from the location of the y(x)= list.
(The corr that is shown is called the correlation
coefficient. It is something you will learn about in a
statistics course and should be ignored in this course.)
Copyright © Houghton Mifflin Company. All rights reserved.
(
) and press the
CALC
as the xlist Name and L
1
after each entry.
(
F2
LINR
(
)
(
+
STAT
F1
CALC
as the output and paste
2
2nd
, press
1
. Next, type
2
.
2
-keys on the
F
as the ylist Name.
2
) .
The linear model fit by the TI-86
)
(
) .
F3
LinR
is of the form
where a is the y-intercept and
b is the slope. This is equivalent,
but not of the same form, as the
model in your text.
(
)
–
LIST
F3
, and
y1. Press
Go the y(x)= list to verify
that the model has been
pasted into the y
B-25
Chapter 1
y = a + bx
location.
1
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