00:01
So here we are need to calculate in elasticity.
00:04
The elasticity is the change in quantity over the change in price.
00:09
So we better get information on quantity and price, right? which we do.
00:12
We just want to make sure we don't mess them up.
00:15
So the change in quantity is, i'm just going to call this in millions.
00:23
Quantity is going from 250 or is going from 250.
00:30
To 240.
00:32
You can do that for free because elasticity has no units.
00:37
So whatever units we use for electricity will cancel each other out.
00:42
So i can use millions of kilowatt hours if i want without loss of generality.
00:46
The price is going from point one to 0 .2.
00:50
Great.
00:52
And we want to pro, it doesn't say you use the midpoints, but i'm going to use a midpoint formula because we might as well.
00:59
The midpoints are 2 .45 and 11.
01:02
So the percent change formula is going to be the new minus the old over the midpoint.
01:08
And the bottom is the same thing.
01:10
It's new minus old over the midpoint.
01:16
We got a whole bunch of something to do.
01:18
So the quantity went down by minus 10.
01:20
The midpoint is 245...