Statistical Operations
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 3-1 Months and Sales Numbers
Month Sales Values
1 150
2 165
3 160
4 175
5 170
Table 3-2 Statistics Example
Keys Display Description
:y
Opens Data menu starting
with the current value for
X(1).
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