### Home > CCA2 > Chapter 2 > Lesson 2.1.1 > Problem 2-9

2-9.

Write the equation for each graph. *2-9 HW eTool* (Desmos). Homework Help ✎

What is the

-intercept? Pick two points and determine the slope.

Refer to part (a).

Which value (

or) is equal toon this line? (Look at the point.) All vertical lines have undefined slope and an equation of the form

.

Refer to part (a).

Use the eTool below to check your answers by graphing your equation.

Click the link at right for the full version of the eTool: *CCA2 2-9 HW eTool*