The equation of the line passing through (1,-11) and \((-4,8)\) can be expressed in the form x / a + y / b = 1 Find a.
Slope = (y1-y2) / (x1-x2) = -19/5
y = -19/5 x + b sub in either point to find b = - 36/5
y = -19/5 x - 36/5 now multiply through by 5
5y + 19x = -36 now divide through by -36 to finish
x / ( -19/36) + y / ( -36/5) = 1