46 Section 3: Numeric Functions
Keystrokes Display
´L
0.777
y-intercept of the line.
®
0.172
Slope of the line.
Retain these statistics in your calculator for use in the next example.
Linear Estimation and Correlation Coefficient
When you execute the j or ª function, the linear estimate (ŷ or
x
ˆ
) is
placed in the X-register, and the correlation coefficient (r) is placed in the Y-
register.
Linear Estimation. With statistics accumulated in registers R
0
through R
5
, a
predicted value for y (denoted ŷ) can be calculated by keying in a known value
for x and pressing ´j. Similarly, a predicted value for x (denoted
x
ˆ
) can
be calculated by keying in a known value for y and pressing ´ª.
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