Exponential Decay Functions
Authored by Anthony Clark
Mathematics
9th Grade
CCSS covered
Used 1+ times
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14 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Terrence buys a new car for $20,000. The value of the car depreciates by 15% each year. If f(x) represents the value of the car after x years, which function represents the car’s value?
f(x) = 20,000(0.85)x
f(x) = 20,000(0.15)x
f(x) = 20,000(1.15)x
f(x) = 20,000(1.85)x
Tags
CCSS.HSF.LE.A.2
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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?
f(x) = 1,200(1.03)x
f(x) = 1,200(0.03)x
f(x) = 1,200(0.97)x
f(x) = 1,200(0.97)x
Tags
CCSS.HSF.LE.A.2
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A population of bacteria is treated with an antibiotic. It is estimated that 5,000 live bacteria existed in the sample before treatment. After each day of treatment, 40% of the sample remains alive. Which best describes the graph of the function that represents the number of live bacteria after x days of treatment?
f(x) = 5000(0.4)x, with a horizontal asymptote of y = 0
f(x) = 5000(0.6)x, with a vertical asymptote of x = 0
f(x) = 5000(1.4)x, with a horizontal asymptote of y = 0
f(x) = 5000(1.6)x, with a vertical asymptote of x = 0
Tags
CCSS.HSF.LE.A.2
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which graph represents exponential decay?
Tags
CCSS.HSF-IF.C.7E
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Chelsea is graphing the function f(x) = 20(1/4)x. She begins by plotting the initial value. Which graph represents her first step?
Tags
CCSS.HSF-IF.C.7E
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which is the graph of f(x) = 100(0.7)x?
Tags
CCSS.HSF-IF.C.7E
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the multiplicative rate of change of the function?
1/5
2/5
2
5
Tags
CCSS.HSF-LE.A.1B
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