Question

Match each exponential function to the description of its percent rate of change.

Answer 1

Explanation:

Answer 2

Given in order:

• 22% growth
• 12% growth
• 12% decay
• 20% decay

Explanation:

The exponential function is in the form
`f(x)=a(1+r)^x`

If r is positive (the number in the bracket is larger than 1), then it is exponential growth and if r is negative (the number in the bracket is less than 1), then it is exponential decay.

Growth or Decay by how much???

The amount that is greater than/less than 1

• The first function's number inside the bracket is greater than 1 by 0.22 (22%). So it is "22% growth".
• The second function's number inside the bracket is greater than 1 by 0.12 (12%). So it is "12% growth".
• The third function's number inside the bracket is less than 1 by 0.12 (12%). So it is "12% decay".
• The fourth function's number inside the bracket is less than 1 by 0.2 (20%). So it is "20% decay".