Page 69 - Math Course 3 (Book 1)

Exponential Functions

Your Turn!

Use Exponential Functions to Solve Problems

Depreciation What is the value of the car after one year?
t
The function V = 22,000 • 0.82 models the
depreciation of the value of a new car that A. $21,000
originally cost $22,000. V represents the value B. $23,600
of the car and t represents the time in years from C. $18,040
the time the car was purchased. D. $20,000

Graph the function.
A. B. Answer

What is the value of the car after three years?
[0,15] scl: 1 by [0,22000] scl: 2000 [0,15] scl: 1 by [0,22000] scl: 2000
A. $12,130
C. D. B. $25,120
C. $10,000
D. $15,000

[0,15] scl: 1 by [0,22000] scl: 2000 [0,15] scl: 1 by [0,22000] scl: 2000
Answer
Answer

Determine whether the set of data displays exponential behavior.

Determine whether the set of data displays exponential behavior.
x 0 10 20 30
A. no
B. yes y 100 50 25 12.5
C. cannot be determined

Answer

Graph each function. State the y-intercept. Then use the
Skill Practice! graph to determine the approximate value of the given
expression. Use a calculator to confirm the value.

x
1. y = 2 ; 2 2.3

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