body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

2. Exponential Growth and Decay

Continue to next subchapter

Exercise 2 Page 286

Which parameter gives information about how fast the exponential function is decaying?

r

Practice makes perfect

Exponential functions that decrease by a constant factor or percentage over equal intervals of x are called exponential decay functions. They can be written in the format shown below.

y = a(1-r)^x Here, a represents the initial quantity and r tells us how fast the function is decaying as a percentage, written in decimal form. This is why r is known as the rate of decay.

Subchapter links

Communicate Your Answer p.281

Monitoring Progress p.282-285

Exercises p.286-288