This is better. Next time at least say what u have learned and
where did u stop understanding...
Let me try to explain in very basic E maths, cannot be used for
your essays one hor...
You have learned what is a y=-x curve. In econs, y is the price,
and x is the quantity demanded, something similar... just that the
curve is shifted, i.e. y=-x+5
So, in that sense, elasticity of demand is something like the
gradient. It is always in negative, because it is downward sloping.
But it is nearly similar only, not totally the same hor... Just
some tips for linkage...
When the elasticity is -1, it is unitary elastic. Means every
change in price will result in an equally proportional change in
quantity demanded.
Then the main gist here is about elasticity.
Value Meaning n = 0 Perfectly inelastic. −1 < n < 0
Relatively inelastic. n = −1 Unit (or unitary) elastic. −∞ < n
< −1 Relatively elastic. n = −∞ Perfectly elastic.
Elastic means a price change will result in a lot a lot
more change in quantity demanded. E.g. $1 increase
in price will result in 2 less pple buying.
Then if even more elastic, $1 increase in price will result in 4
less pple buying
Perfectly elastic, $1 increase in price will result in 0 pple
buying.
Example graph for perfectly elastic:

Similar for decrease in price.
Read your textbook for this part on how to use graphs to draw
and show.
Inelastic means a price change will result in a lot a lot
less change in quantity demanded. E.g. $1 increase
in price will result in almost the same number pple buying. Means
things that no choice, you still have to use. Example in Singapore
would be... increase in bus fares or mrt fares, you still have to
take it. Increase in prices of newspaper, increase in prices of
cigarettes... The quantity demanded wouldn't change much no matter
you increase or decrease the prices!
ok...sry that i just remember that, hmmm....i dont understand
this part...
"Value Meaning n = 0 Perfectly inelastic. −1 < n < 0
Relatively inelastic. n = −1 Unit (or unitary) elastic. −∞ < n
< −1 Relatively elastic. n = −∞ Perfectly elastic."
&
if there is perfect elasticy, is it good or bad...
sry to ask so much basic questions, as i this is my first time
learning this...