The equation of the line below can be expressed in the form\frac{x}{a} + \frac{y}{b} = 1.Find a.
Slope = (4 - - 5) / ( 5 - - 1) = 9/6 = 3/2
Eq of line
y = (3/2) (x -5) + 4
2y = 3(x -5) + 8
2y = 3x -7
y = (3/2)x - 7/2
(3/2)x - y = 7/2 mult through by 2/7
(3/7)x - (2/7)y = 1
x / (7/3) - y / (7/2) = 1
+677 
