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Home > AC > Chapter 12 > Lesson 12.4.3 > Problem 12-94


If and , and if the graph of is a line:

  1. Graph the line on graph paper.

  2. Find the equation for .

  3. If is a line that is perpendicular to , what is its slope?

represents the point .
Graph this point and the point corresponding to in order to sketch the line.

Use the format wherem = slope (growth) and -intercept (starting point).

Find the growth and substitute one of the coordinates of a point in the problem and solve for b.

A line that is perpendicular to has a slope that is the negative reciprocal of the slope of the line .