### Home > CCG > Chapter 8 > Lesson 8.3.3 > Problem8-117

8-117.

In 2000 a share of Jiffy Stock was worth $20$ and in 2010 it was worth $50$. What was the annual multiplier and the annual percent of increase?

Use the exponential function formula: $y = a \cdot b^x$

Refer to the Math Notes box in Lesson 7.2.2.
Be sure to note the initial value $(a)$ and the time $(x)$.