Question

the equation of the line passing through the origin and (3,4)...

Answer 1

slope of joining the points ( 0, 0) and ( 3, 4) = (4-0)/(3-0) =4/3

so, equation of line
(y -4) =4/3(x -3)

3y -12 = 4x -12

4x = 3y

Answer 2

slope=4-0/3-0=4/3
equation             y-0=4/3(x-0)
                          3y=4x
                            4x-3y=0