Which is the best explanation?

Question

Data on the diameter (in inches) and the age (in years) of a sample of 25 oak trees yielded the regression equation diameter = 1.18 + 0.165 · age and the residual plot shown here.
Which of these is the best explanation of the relationship between growth in diameter and age of tree?

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The diameter grows at approximately 0.165 inch per year throughout the life of the tree.

The diameter grows slower than 0.165 inch per year early in the life of the tree and faster than 0.165 inch per year later in life.

The diameter grows faster than 0.165 inch per year early in the life of the tree and slower than 0.165 inch per year later in life.

The diameter grows at a rate of 1.18 inches per year throughout the life of the tree.

Answer 1

No plot is shown so it is not possible to answer this question fully.