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Given the two points  and :   

  1. Write the equation of the line passing through the points.

    Find the slope between the two points 

    Use the slope-intercept form (). Substitute the slope (), and one point or for and to solve for .

  2. Is also on the same line? Explain your reasoning.

Use the eTool below for part (b).
Click the link at right for the full version of the eTool: