Which is the equation of the line 3 1 and 0 0?

Answer 1

I assume that is a straight line between point (0, 0) and point (3, 1):

The equation of any line is given by:

y - yo = m(x - xo)

where m is the gradient given by:

m = (y1 - yo)/(x1 - x0)

Thus, line is:

y - 0 = (1 - 0)/(3 - 0)(x - 0)

⇒ y = 1/3 x

or 3y = x