### Home > CCA2 > Chapter 4 > Lesson 4.2.2 > Problem 4-88

4-88.

Think about the axis system in the two-dimensional coordinate plane. What is the equation of the -axis? What is the equation of the

*-axis?*

What are the -values for all the points on the

*-axis?*

How would you write an equation to describe that?

Make a list of several points on the

*-axis if you need to.*

Similarly, what are the -values of all the points on the vertical axis?