Algebra Course Lecture - 21 (Lines, Slopes, Parallel, and Perpendicular)

This video is presenting another lecture (# 21) of the "Algebra Course Series". It explains how to find the slope of a line, and how to deal with parallel and perpendicular lines. The ideas of lines and slopes are presented here through many solved examples.

#findslopeofline #parallellines #perpendicularlines

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In old exam question 6, how the point (3, -4) tangent the circle x^2+y^2=25 ? I think this is not true.
Because the point (3, -4) inside the circle