(a) Show that if the x- and y-intercepts of a line are nonzero numbers a and b, then the equation of the line can be put in the form x/a + y/b = 1
This equation is called the two-intercept form of an equation of a line.
(b) Use part (a) to find an equation of the line whose x-intercept is 6 and whose y-intercept is -8.