+826 The equation of the line below can be expressed in the form
\frac{x}{a} + \frac{y}{b} = 1.
Find a.
+37146 Use the two labelled points to calculate the slope = (-5-4) / ( -1 -5) = 9/6
In y = mx + b form this becomes y = 9/6 x + b sub in any point on the line to find b = - 3.5
so the line is y = 9/6 x - 3 1/2 re-arrange
- 9/6 x + y = - 3 1/5
divide thru by - 3 1/2
3/7 x - 2/7 y = 1 so a = 3/7
