### Home > INT3 > Chapter 1 > Lesson 1.2.2 > Problem 1-90

1-90.

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

*-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?