Two quantities are said to be in direct proportion if they increase or decrease in the same ratio. If two amounts are directly proportional we can scale the quantities up by multiplying. 600 + 150 = ...

The cost of the pencils (C) is directly proportional to the number of pencils (n). When the proportionality sign (∝) is replaced with an equal sign (=), the equation is \(x = k y\). The constant value ...

With the Sundance Film Festival right around the corner, I thought it would be appropriate to re-publish a little post I wrote some time ago in the waning days of the 2008 fest. Originally published ...