Given: line passes through the point with position vector and parallel to the line joining the points with position vectors and .
To find: equation of line in vector and Cartesian forms
Formula Used: Equation of a line is
where is a point on the line and with b1 : b2 : b3 being the direction ratios of the line.
The direction ratios of the line are (1 - 2) : (-1 - 3) : (5 + 4)
⇒ -1 : -4 : 9
⇒ 1 : 4 : -9
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