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A bar of soap was weighed after showering to see how much soap was used each shower.
A data frame with 15 observations on the following 3 variables.
days since start of soap usage and data collection
weight of bar of soap (in grams)
According to Rex Boggs:
I had a hypothesis that the daily weight of my bar of soap [in grams] in my shower wasn't a linear function, the reason being that the tiny little bar of soap at the end of its life seemed to hang around for just about ever. I wanted to throw it out, but I felt I shouldn't do so until it became unusable. And that seemed to take weeks.
Also I had recently bought some digital kitchen scales and felt I needed to use them to justify the cost. I hypothesized that the daily weight of a bar of soap might be dependent upon surface area, and hence would be a quadratic function ... .
The data ends at day 22. On day 23 the soap broke into two pieces and one piece went down the plughole.
data(Soap)
gf_point(weight ~ day, data = Soap)
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