HP HP-18C - Page 108

Bolden's wants to determine whether there is a linear relationship be-
tween the amount of radio advertising purchased and the weekly
sales.
Part 2. If a strong relationship exists, Bolden's wants to use the rela-
tionship to forecast sales.
Starting from the MAIN menu:
Keys:
IGmII *
• ! CLEAR ALL)
..
2!INPUT)
1!INPUT)
3!INPUT)
5!INPUT)
5 [INPUT!
4!INPUT)
ID'i1DI
MINUTES
!INPUT!
Display:
tITEM(l)=
TOTAL=0,00
ITEt'1(6)=4,00
tITnl(7)=
TOTAL=20,00
t'~AME IS NOI,j:
tM I t~UTES
tITE~l(l)=
TOTAL=0,00
Description:
Displays the SUM
menu.
Clears the number list .
Enters
the number of
minutes of advertising
(x-values) into a SUM
number list.
This message is briefly
displayed.
Switches to a new,
empty
list.
* If you want to preserve the current number list, skip the next step (pressing .1 CLEAR ALL 1 ).
Instead, name the list (refer to page 111), and then press .. limB .
106 6: Running Total and Statistics Calculations