- 1. What is the general form of an exponential function?
A) y=2x2
B) y=mx+b
C) x=5
D) y=abx
- 2. Which equation is NOT an exponential function?
A) y=2x
B) y=3(5)x
C) y=200(.5)x
D) y=2x(3)
- 3. Is the following set of points an exponential function? {(2,3), (3,6), (4,12), (5,24)}
A) No
B) Yes
- 4. Is the following set of points an exponential function? {(2,.2), (3,1), (4,5), (5,25)}
A) Yes
B) No
- 5. Is the following set of points an exponential function? {(-1,-2), (1,2), (3,6), (5,10)}
A) No
B) Yes
- 6. The graph shown represents an exponential function.
A) False
B) True
- 7. If creating a t-chart to graph the function f(x)=2(3)x, what is the value of f(x) when x= -1?
A) 2/3
B) 6
C) 1/3
D) .1667
- 8. If creating a t-chart to graph the function f(x)=100(.5)x, what is the value of f(x) when x= 3?
A) 12.5
B) 1.25
C) 125,000
D) .125
- 9. The function f(x)=6(1.5)x models the length of a photograph in inches after the photo has been enlarged by 50% x times. What is the length of a photo after it has been enlarged 4 times?
A) 36 in.
B) 30.375 in.
C) 45.25 in.
D) 6561 in.
- 10. If a ball is bounced from a height of 22 feet, the function f(x)=22(.7)x gives the height of each bounce, where x is the bounce number. What will the height of the ball be on the 6th bounce?
A) 13.33 feet
B) 3.9 feet
C) 2.6 feet
D) 92.4 feet
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