Skills · Functions · Exponential Functions
Growth or decay, and by what percent
Printable practice with an answer key the engine computes, at three levels, in as many versions as you need.
Problem types
- growth: y = 50(1.04)^t
- decay: y = 200(0.85)^t
- doubling: y = 30(2)^t
- decay under 10%: y = 500(0.98)^t
Sample Sheet · Level 1
- y = 200(0.6)t: percent change each year
- y = 1,000(0.75)t: percent change each year
- y = 500(1.3)t: percent change each year
- y = 1,500(1.4)t: percent change each year
- y = 300(1.5)t: percent change each year
- y = 300(0.65)t: percent change each year
- y = 250(0.8)t: percent change each year
- y = 400(1.03)t: percent change each year
Answer key
- −40%
- −25%
- 30%
- 40%
- 50%
- −35%
- −20%
- 3%
Sample Sheet · Level 3
- y = 250(0.9)t: percent change each year
- y = 1,500(0.75)t: percent change each year
- y = 1,200(0.98)t: percent change each year
- y = 250(0.96)t: percent change each year
- y = 5,000(0.91)t: percent change each year
- y = 300(2)t: percent change each year
- y = 200(1.5)t: percent change each year
- y = 250(1.4)t: percent change each year
Answer key
- −10%
- −25%
- −2%
- −4%
- −9%
- 100%
- 50%
- 40%
Make your own
Pick the count, the level and the version, and print it with work space and the key on its own page. The same skill also makes an I Do, We Do, You Do lesson, a Mosaic, a Decoder and more.