From the course: Test Prep: GRE

Unlock the full course today

Join today to access over 22,600 courses taught by industry experts or purchase this course individually.

Direct proportion and inverse variation

Direct proportion and inverse variation

From the course: Test Prep: GRE

Start my 1-month free trial

Direct proportion and inverse variation

“

- [Voiceover] Two kinds of proportions that I want you to be aware of are direct proportion and then inverse variation. So, direct proportion is what I did in the previous video. So, again, let's say for every two cups of sugar there are three eggs in a recipe and a direct proportion would be useful to do if I wanted to just expand the recipe and maybe figure out okay I need to use 40 cups of sugar and then I wanted to figure out how many eggs I need so we just cross multiply and, like before, we're eventually going to figure out that we need 60 eggs. What about a different situation in which we have an inverse proportion? So I'll show you what I mean by that logic. So, let's say I have a bunker that I'm prepping for the apocalypse and I wanna stock it with food and I'm gonna say that my bunker can last 30 people 90 days so there's 90 days worth of food. Let's see, I wanted to figure out how long that same food supply would last 15 people. I might think about setting up a proportion…

Contents