HP 20b Business Consultant Quick Start Manual page 36

Sales for the last five months are represented by the pairs of values shown
below, with the month number as x , and the sales values as y . Enter these
into the Data menu. Using the Stats menu for Predictions , predict sales for
month seven. What is the slope and y-intercept of the linear regression line?
What is the sum of all the y values?
Table 3-2 Statistics Example
Keys
:y
Table 3-1 Months and Sales Numbers
Month
1
2
3
4
5
Display
Sales Values
150
165
160
175
170
Description
Opens Data menu starting
with the current value for
X(1).
36
Statistical Operations