# Content-Type: text/shitpost

Path: you​!your-host​!walldrug​!prime-radiant​!skordokott​!mechanical-turk​!berserker​!plovergw​!shitpost​!mjd
Date: 2018-05-21T14:47:39
Newsgroup: talk.mjd.water-pik
Message-ID: <c8e66ec10387054a@shitpost.plover.com>
Content-Type: text/shitpost

Here are the volume graduations on the tank of my Water-Pik:

Now what is going on here?

I measured the heights of the marks in pixels in the photo:

 OZ. ML. pixels 600 1094 19 963 500 838 16 707 400 590 12 456 300 335 9 199 200 86 6 -50

Then I ran linear regressions.

For the milliliters values, the line is $$\text{px} = 2.59\text{ ml } -419$$ with a correlation of 99.9988%. Fair enough.

For the ounces values, the line is $$\text{px} = 76.5\text{ oz } -495$$ with a 99.86% correlation. That slope of !!76.5\frac{\text{px}}{\text{oz}}!! is exactly the same as the !!2.59\frac{\text{px}}{\text{ml}}!! slope in the previous line. If we correct the two suspicious ounce numbers from 16 and 19 to 15 and 18, the correlation goes up to 99.9988% but the slope increases to !!84.5\frac{\text{px}}{\text{oz}}!!.

I guess the next step would be to measure the amounts but

Addendum: That's the point at which I lost interest and broke off mid-sentence. It's now about 24 hours later and I've decided to publish what I have.

Enjoy!