Exponential Decay Functions Answers
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21
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Which is the graph of ?
A
OptionB
OptionC
OptionD
Option22
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Chelsea is graphing the function f(x) = 20()x. She begins by plotting the initial value. Which graph represents her first step?
A
On a coordinate plane, the point (0, 0.25) is graphed.
B
On a coordinate plane, the point (0.25, 0) is graphed.
C
On a coordinate plane, the point (0, 20) is graphed.
D
On a coordinate plane, the point (20, 0) is graphed.
23
The table represents an exponential function.
A
0.2B
0.25C
0.5D
0.7524
Ginny is studying a population of frogs. She determines that the population is decreasing at an average rate of 3% per year. When she began her study, the frog population was estimated at 1,200. Which function represents the frog population after x years?
A
f(x) = 1,200(1.03)xB
f(x) = 1,200(0.03)xC
f(x) = 1,200(0.97)xD
f(x) = 1,200(0.97x)
26
Which is the graph of ?
A
OptionB
OptionC
OptionD
Option27
The table represents an exponential function.
A
One-fifth
B
Two-fifths
C
2D
528
The table represents an exponential function.
A
0.2B
0.25C
0.5D
0.7529
The graph of f(x) = 2x is shown on the grid.
A
On a coordinate plane, an exponential function approaches x = 0 in quadrant 4 and increases into quadrant 1.
B
On a coordinate plane, an exponential function decreases from quadrant 2 into quadrant 1 and approaches y = 0.
C
On a coordinate plane, an exponential function approaches y = 0 in quadrant 3 and curves down into quadrant 4.
D
On a coordinate plane, an exponential function approaches x = 0 in quadrant 1 and curves down and to the right into quadrant 4.
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