Name __________________________________________ Class __________ Date: ________________
Practice
8-2
The Reciprocal Function Family
Sketch the asymptotes and graph each function. Identify the Domain and the Range.
y
1.
5
x

y
2.
4
x

y

y
















y
4.




x





























y
5.
3
5
4x

y

y


























3
8
( x  4)
y
6.
y

x





x


1
3
x
y

x

3
2
x 1
y
3.
x










x




















7.
The length of a pipe in a panpipe
(in feet) is inversely proportional to its pitch p (in hertz).
497
The inverse variation is modeled by the equation p 
.
Find the length required to produce a pitch of 220 Hz.
8-9. The junior class is buying keepsakes for Class Night. The price of each keepsake p is
inversely proportional to the number of keepsakes k bought. The keepsake company also
1800
offers 10 free keepsakes in addition to the class’s order. The equation p 
models
k  10
this inverse variation.
8. If the class buys 240 keepsakes, what is the price for each one?
9. If the class buys 400 keepsakes, what is the price for each one?
Choose the best response.
10.
11.
12.