7th Grade Growth and Decay: Graphing Functions Quiz

A population of rabbits doubles every month. If there are 50 rabbits now, how many will there be in 3 months? Graph the growth function.

• 400

• 800

• 200

• 100

A tree grows 2 inches every year. If it is currently 5 feet tall, how tall will it be in 10 years? Graph the growth function.

• 5 feet 10 inches

• 6 feet 8 inches

• 8 feet 4 inches

• 7 feet 2 inches

A bacteria culture starts with 200 bacteria and decreases by 25% each hour. How many bacteria will be left after 4 hours? Graph the decay function.

• 100

• 63

• 150

• 50

A car's value decreases by 15% each year. If the car is worth $20,000 now, what will its value be in 5 years? Graph the decay function.

• $8,874.37

• $12,000.00

• $15,000.00

• $5,000.00

A savings account earns 5% interest compounded annually. If you deposit $1,000, how much will you have in 3 years? Graph the growth function.

• $1,100.50

• $1,157.63

• $1,050.00

• $1,200.00

A candle burns down to half its height every hour. If the candle is 12 inches tall, how tall will it be after 3 hours? Graph the decay function.

• 3 inches

• 6 inches

• 1.5 inches

• 0 inches

A plant grows 3 cm per week. If it starts at 10 cm, how tall will it be after 8 weeks? Graph the growth function.

• 34 cm

• 40 cm

• 28 cm

• 30 cm

A radioactive substance decays to half its amount every 10 years. If you start with 80 grams, how much will remain after 30 years? Graph the decay function.

• 10 grams

• 20 grams

• 5 grams

• 15 grams

A population of fish in a lake decreases by 10% each year due to overfishing. If there are 1,000 fish now, how many will be left in 4 years? Graph the decay function.

• 400

• 656

• 500

• 800

A new technology is adopted by 20% of the population each year. If 1,000 people use it now, how many will use it in 5 years? Graph the growth function.

• Approximately 2488 people will use the technology in 5 years.

• Approximately 1800 people will use the technology in 5 years.

• Approximately 1500 people will use the technology in 5 years.

• Approximately 3000 people will use the technology in 5 years.