### Home > A2C > Chapter 6 > Lesson 6.1.1 > Problem 6-7

6-7.

Graph

and its undoing function on the same set of axes). 6-14 HW eTool (Desmos). Homework Help ✎ What is the equation of the undoing function?

Does this graph, including both lines, have a line of symmetry? If so, what is the equation of the line of symmetry?

Rewrite the equation by undoing the operations on *x*, that is solve for *x*.

Now use your result to write the inverse function.

*y* = 2*x* + 6

The line of symmetry is *y* = *x*.

Use the eTool below to view the graphs of the lines in this problem.

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