I need to know how to write an equation of a line through B that is perpendicular to line AC.

The slope of line AB is 3/4. The slope of line AC is -1/7. On a graph, A is (-2,0), B is (2,3), and C is (5,-1).

Question

I need to know how to write an equation of a line through B that is perpendicular to line AC.

The slope of line AB is 3/4.  The slope of line AC is -1/7.  On a graph, A is (-2,0), B is (2,3), and C is (5,-1).

anonymous · Answer

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equation of a striaght line with slope m through the point$$X_{0},Y_{0}$$

is $$y-Y _{0}=m(x-X _{0})$$