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Home > AC > Chapter 7 > Lesson 7.3.1 > Problem 7-85


The point is on a line with slope .  

  1. Find the equation of the line.

    The equation of a line is in the format, where and .

    Substitute the slope and the point given in the problem into .

    Solve for .

    Don't forget to check your solution!

  2. Find the coordinates of a third point on the line.

    One way to find this is to substitute an or value of your choice into the equation you found in part (a).

    Sam substitutes the value into the equation.

    The coordinates of the third point that Sam found are .

Complete the table in the eTool below to find the equation of the line and additional points.
Click the link at right for the full version of the eTool: AC 7-85 HW eTool