00:03
Hello.
00:04
So your problem asks you to write an equation that expresses a relationship, and that's described with the idea of two things being proportional in a specific way.
00:15
It tells you that really two different facts.
00:18
It tells you d varies directly with w, which is one piece that you have to put into the expression you end up writing.
00:26
And then the second piece is that d also inversely varies with the square of p.
00:32
So when i'm talking about, about something that directly varies.
00:35
First of all, i wrote in here, make sure you're using k is the constant of proportionality, which is probably pretty common.
00:42
I'm sure that that's what you're using most of the time when you're doing this anyway.
00:46
But as you go through, so for this first part here in green, if d varies directly with w, that means d equals k times w.
00:55
So this is just a multiplication relationship.
00:59
And then when you're talking about it varying inversely, then that's basically the opposite of that.
01:04
It's kind of a division relationship...