Question

Find the equation of the line passing through A (a, b) B ( b,a) ​

Answer 1

Answer:

the equation of the line passing through A (a, b) B ( b,a)

$y = mx + c \\ y - b = (\frac{a - b}{b - a}) (x - a) \\ y - b = - (x - a) \\ x + y = a + b$