What is the approximate slope of a linear trend for the value of Bob's beer can collection? 
Definitions:
Worker Productivity
The measure of the efficiency of a worker or group of workers in converting inputs into useful outputs.
Telomeres
The area at the tips of each chromosome that is reduced to a tiny amount as time passes. By the end of life, the telomeres are very short.
Chromosomes
Long, stringy formations found within the cell nucleus of both animals and plants, composed of proteins and a solitary DNA molecule, responsible for bearing genetic data.
Longevity
The length of an individual's life, often explored in the context of factors that contribute to a prolonged life span.
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