If three points `A(h ,0),\ P(a , b)a n d\ B(0, k)` lie on a line, show that: `a/h+b/k=1.`

Explanation

To prove that if the points \( A(h, 0) \), \( P(a, b) \), and \( B(0, k) \) lie on a straight line, then \( \frac{a}{h} + \frac{b}{k} = 1 \), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Points**:
- Let \( A(h, 0) \) be the point on the x-axis.
- Let \( P(a, b) \) be a point in the Cartesian plane.
- Let \( B(0, k) \) be the point on the y-axis.
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