54. ZYDECO MUSIC The graph shows the
Music
䊳 Source: Louisiana Zydeco Music Festival.
Music Festival
Attendance
number of people who attended the Southwest
Louisiana Zydeco Music Festival for different
years, where t is the number of years since
1980. Is the number of people who attended
the festival a function of the year? Explain.
9000
6000
3000
0
0
5 10 15 t
Years since 1980
55. MASTERS TOURNAMENT The table shows the scores and prize money
earned for the top 7 winners of the 1997 Masters Tournament at Augusta
National Golf Club. Graph the relation. Is the money earned a function of the
score? Explain. If it is a function, give the domain and range. 䊳 Source: Golfweb
ZYDECO MUSIC blends
elements from a variety of
cultures. The accordion has
German origins. The rub
board was invented by
Louisiana natives whose
ancestors were French.
Score
Prize ($)
270
282
283
486,000
291,600
284
285
285
183,600 129,600 102,600 102,600
286
78,570
BUTTERFLIES In Exercises
56–58, use the diagram
and caption about monarch
butterfly migration at the
right.
56. Write a linear function
that models the distance
traveled by a migrating
monarch butterfly.
57. Use the model to estimate
the distance traveled after
30 days of migration.
58. Graph your model and
Monarch butterflies migrate from the northern United
States to Mexico. The 2000 mile trip takes about 40 days.
label the point that
represents the distance
traveled after 30 days.
59.
Standardized Test
Practice
It takes 4.25 years for starlight to travel 25 trillion miles.
Let t be the number of years and let f(t) be trillions of miles traveled. Write a
linear function f(t) that expresses the distance traveled as a function of time.
60. MULTIPLE CHOICE Write the equation 3x y 5 in function notation.
A

C

B

D

f(x) y 5
f(x) 3x 5
f (x) 3x 5
f (x) y 5
61. MULTIPLE CHOICE Evaluate the function f(x) x 8 when x 2.
F

6
G

10
H

16
4.8
J

16
Functions and Relations
257