What is the equation of the line that passes through the points
2 point formula
$$\boxed{y-y_1=m(x-x_1)}\\\\ \mbox{or as I prefer to say}\\\\ \begin{array}{rll} gradient&=&gradient\\\\ \dfrac{y-y_1}{x-x_1}&=&m \end{array}$$
Which points?
can the question be made a bit more clear !