Do a google search with key-words "equation of a line through two given points".A possible equation of a line that passes through (2,4) and (-1,10) is
The wording of the problem suggests that it might be multiple choice. If so, please tell us the choices; they will at least tell us what form of equation is expected. (Do you notice that "a possible equation", rather than "the equation", signals that there are several possible forms for the answer?)A possible equation of a line that passes through (2,4) and (-1,10) is