### Home > PC3 > Chapter 3 > Lesson 3.2.1 > Problem3-99

3-99.

Use the table below to write an equation for $x_k$ in terms of $k$.

 $k$ $x_k$ 1 2 2 3.5 3 5 4 6.5 5 8

Notice that this is a linear function. Write an equation for a linear function that passes through the points $(1,2)$ and $(2,3.5)$.