# Difference between revisions of "Talk:2327: Oily House Index"

Dangit Randall, this was my retirement plan & now everybody's gonna want to try it! ProphetZarquon (talk) 00:53, 2 July 2020 (UTC)

Maths

Can someone figure out where I went wrong here?
>The comic then applies dimensional analysis to this index: dividing \$/sqft by \$/bbl yields a result whose dimension is a linear measurement, which can be called length. 1 barrel is 5.6 cubic feet. The average price per square foot of a new single-family dwelling in the USA in 2019 was about 119 \$/sqft, while the price of oil in mid 2019 was about \$60/BBL or \$337/cubic foot. Dividing gives 60/337 feet-1 or about 5.61 feet. (This doesn't match the value shown on the chart of around 15, so we have done something wrong here. :))
Thanks. Stevage (talk) 00:54, 2 July 2020 (UTC)

Since barrels are in the denominator, you have to divide by 5.6 to get the price per cubic foot. LegionMammal978 (talk) 01:00, 2 July 2020 (UTC)
Units

Shouldn't area divided by volume be height, not length? It would also fit better with the graph. 162.158.123.173 03:41, 2 July 2020 (UTC)

For dimensional analysis, you don't care about the physical context of the units, just about the dimension they are associated with. Height is horizontal length, so it has the dimension of length. In the context of the comic this length can be interpreted as a height, but in another context, it could be a length in a different orientation. 162.158.88.78 04:16, 2 July 2020 (UTC)
Category

Should we start a category of dimensional analysis comics: e.g. 687, 1707, 2312 --WhiteDragon (talk) 07:41, 2 July 2020 (UTC)