A researcher studying a specific type of tree creates a least-squares regression line for relating the height and the diameter, both in meters, of a fully grown tree. The results are shown in the following computer output.
Variable DF Estimate SE T
Intercept 1 5 4.00 2.50
Diameter 1 30 2.50 113.4
which of the following values represents the predicted change in the height of the tree for each one-meter increase in the diameter of the tree?
a. 30
b. 5
c. 4
d. 2.5
e. 1/30

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