Sharp EL-W535TG Operation Manual page 45

Differentiation calculation
(This example is for EL-W516T only.)
<Example 1>
If the demand curve is expressed by
find the price elasticity of demand when P=360 (D=48).
Find the following value when P=360 and D=48.
-
360
25920
- 24
D =
P
*Price elasticity of demand:
A value that indicates how sensitive demand is to changes of price.
Price elasticity
-
=
of demand
25920
(
- 24
d
P x
D
dx
Operation
360
d/dx
25920
x
d/dx
Rate of demand
change
=
Rate of price
change
)
x = 360
48
24
45
x
dD
D
P dD
- -
=
D dP
dP
P
Display