Modeling Growth & Decay

Algebraville's population of 55,000 is growing at a rate of 3% each year since 2020. Which function models this?

The number of flip phones are decreasing at a rate of 12% per year since the year 2010. That year there was still an estimated 5,000,000 flip phones still out there. Which function models this?

The number of narwhals spotted in the Arctic are increasing at a rate of 8.9% per year. In 2022, 390 narwhals were spotted in the Arctic. What function models this growth since 2022?

The number of Yetis spotted each year has been decreasing at a rate of 23% since 2008. That year 540 were spotted. What function models this situation?

Cars usually decrease in value each year at a rate of 15%. If my Hyundai Tucson was bought new for $24,500 in 2018, which function models this situation?

Homes usually increase in value each year at a rate of 7.8%. If a new home was built and sold in 2024 for $400,000, which function would model this increase?

A decrease each year by 25% on an original value of 900 could be modeled by which function?

An increase each year by 25% on an original value of 900 could be modeled by which function?

The number of mosquitoes this summer rose exponentially at a rate of 22% each day in July. If, on July 1, there were an estimated 780,000 mosquitos, which function models this?

• Growth because the multiplier is over 1.

• Growth because the multiplier is under 1.

• Decay because the multiplier is over 1.

• Decay because the multiplier is under 1.