### Home > A2C > Chapter 9 > Lesson 9.3.1 > Problem 9-128

9-128.

Given the equation: 3

*x*+*y*−*z*= 6. Homework Help ✎Draw a graph.

Is (1, 2, −1) on the graph?

**Justify**your answer.

Notice that there are three variables. Find the 3 intercepts.

Yes, it is a solution to the equation