The equation of the line below can be expressed in the form\frac{x}{a} + \frac{y}{b} = 1.Find a.
Slope of PQ = [ 4 - -5 ] / [ 5 - -1] = 9 / 6 = 3 / 2
y =(3/2) (x - 5) + 4 multiply through by 2/3
(2/3)y = x - 5 + 8/3
(2/3)y = x - 7/3 rearrange
x - (2/3)y = 7/3 multiply by 3/7
(3/7)x - (3/7)(2/3)y = 1
(3/7)x - (2/7)y =1
x / ( 7/3) y / ( 7/2) = 1
+1246 
