### Home > PC3 > Chapter 4 > Lesson 4.3.1 > Problem4-112

4-112.

Use the functions below to write an equation for $f(x_n)$.

$f(x)=b(2)^x$

 n xn 1 2.4 2 2.8 3 3.2 4 3.6

Use the table to write an equation for $x_n$.
Notice that this is a linear function.
Write the equation of a line that passes through the points $(1,2.4)$ and $(2,2.8)$.