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Home > CCG > Chapter 1 > Lesson 1.2.3 > Problem 1-77
Use what you learned about the slopes of parallel and perpendicular lines to find the equation of a line that would meet the criteria given below.
Find the equation of the line that goes through the point
and is perpendicular to the line .
Use the eTool below to help you find the equation in part (a).
Click the link at right for the full version of the eTool: CCG 1-77a HW eToolDetermine the slope of the new line.
Remember that the slope of a perpendicular line is the opposite reciprocal of the slope of the original line.Substitute in the point given to determine the y-intercept.
Find the equation of the line that is parallel to the line
and goes through the point .
Use the eTool below to help you find the equation in part (b).
Click the link at right for the full version of the eTool: CCG 1-77b HW eToolRewrite the equation in
form. What is the slope of a parallel line?