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4-10.

What is the y-intercept? Pick two points and determine the slope.

Refer to part (a).

Which value (x or y) is equal to 2 on this line? (Look at the point.)

All vertical lines have undefined slope and an equation of the form x = k.

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: A2C 4-10 HW eTool