### Home > CC3 > Chapter 9 > Lesson 9.2.3 > Problem 9-90

9-90.

Use the rule

What is the slope of the line?

Pick two points on the line and find the change in

-values over the change in-values to find the slope.

What do you get? Does this value correspond with a value in the rule above?Where does the line cross the

-axis?Where on the graph does the line cross the

-axis?

Also, logically, the graph will cross the-axis when.

Using the rule, can you calculate this value?

What do you get? Does this value correspond with a value in the rule above?

Use the eTool below to help you with this problem.

Click the link at right for the full version of the eTool: *9-90 HW eTool*