What is the equation of the line passing through $(21,18), (0,5)$ ?

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Answer 1 · 2016-03-13T01:49:10

$13x-21y=-105$

Let $P_2(21, 18)$ and $P_1(0, 5)$

By the Two-point Form

$y-y_1=(y_2-y_1)/(x_2-x_1)(x-x_1)$

$y-5=(18-5)/(21-0)(x-0)$

$y-5=(13/21)*x$

$21y-105=13x$

$13x-21y=-105$

God bless....I hope the explanation is useful.

What is the equation of the line passing through (21,18), (0,5)(21,18), (0,5)?