HP 35s User Manual page 255

13. For a new case, go to step 2.
Variables Used:
B
M
R
X
Y
Statistics registers
Example 1:
Fit a straight line to the data below. Make an intentional error when keying in the
third data pair and correct it with the undo routine. Also, estimate y for an x value
of 37. Estimate x for a y value of 101.
X 40.5
Y 104.5
Keys:
(In RPN mode)
S

Regression coefficient (y–intercept of a straight line); also
used for scratch.
Regression coefficient (slope of a straight line).
Correlation coefficient; also used for scratch.
The x–value of a data pair when entering data; the
hypothetical x when projecting
when given a hypothetical y.
The y–value of a data pair when entering data; the
hypothetical y when projecting
when given a hypothetical x.
Statistical accumulation and computation.
38.6 37.9
102 100
Display:



value
x ˆ
y ˆ
; or
x ˆ y ˆ
; or
36.2 35.1
97.5 95.5
Description:
Starts straight–line routine.
Enters x–value of data pair.
Statistics Programs
(x–estimate)
(y–estimate)
34.6
94
16-9