Chapter 4.4, Problem 19SBE

Round all answers to two decimal places.

Using Exponential Models In Exercises S-15 through S-24, we use exponential models from Exercises S-5 through S-14 to obtain further information.

Use the model found in Exercise S-9 to calculate $y\left(10\right)$ and to solve $y=9$ for $x$.

Exponential Regression In Exercises S-7 through S-14, use exponential regression to fit the data set. Give the exponential model, and plot the data along with the model.

S-9

x	4.2	7.9	10.8	15.5	20.2
y	7.5	8.1	8.5	10.2	12.3