### Home > PC3 > Chapter 4 > Lesson 4.1.2 > Problem4-30

4-30.

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

$f(x)=d(x-2)^2$

 k xk 1 2.5 2 3.0 3 3.5 4 4.0

Start by using the table to write a linear equation for $x_k$.