Exponential growth and decay
9th grade (Year 10 in England) · 16 questions · Common Core: HSF.LE.A.1, HSF.LE.A.2, HSF.IF.C.8.B · England: GCSE Higher Algebra
Name
Date
Score/ 16
Question 1
Does y = 83(0.5)ˣ show exponential growth or decay?
- A. Growth
- B. Decay
Question 2
y = 6 × 1.5ˣ. Find y when x = 2. Round to 2 decimal places if needed.
Answer
Question 3
Arjun's bacteria culture starts with 100 cells and doubles every 2 hours. How many cells after 6 hours?
Answer
Question 4
Does y = 37(0.8)ˣ show exponential growth or decay?
- A. Growth
- B. Decay
Question 5
y = 19 × 0.5ˣ. Find y when x = 3. Round to 2 decimal places if needed.
Answer
Question 6
Tariq's bacteria culture starts with 480 cells and doubles every 4 hours. How many cells after 16 hours?
Answer
Question 7
Does y = 85(2)ˣ show exponential growth or decay?
- A. Growth
- B. Decay
Question 8
y = 39 × 1.5ˣ. Find y when x = 4. Round to 2 decimal places if needed.
Answer
Question 9
Jamal's bacteria culture starts with 450 cells and doubles every 3 hours. How many cells after 3 hours?
Answer
Question 10
Does y = 63(2)ˣ show exponential growth or decay?
- A. Growth
- B. Decay
Question 11
y = 40 × 0.5ˣ. Find y when x = 4. Round to 2 decimal places if needed.
Answer
Question 12
Luis's bacteria culture starts with 450 cells and doubles every 3 hours. How many cells after 3 hours?
Answer
Question 13
Does y = 56(1.2)ˣ show exponential growth or decay?
- A. Growth
- B. Decay
Question 14
y = 45 × 3ˣ. Find y when x = 4. Round to 2 decimal places if needed.
Answer
Question 15
Ines's bacteria culture starts with 270 cells and doubles every 2 hours. How many cells after 8 hours?
Answer
Question 16
Does y = 8(3)ˣ show exponential growth or decay?
- A. Growth
- B. Decay
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