A line goes through point $A(9, 1)$, point $B(19, k)$ and point $C(7, 0)$. What is the value of $k$?
Question:
A line goes through point $A(9, 1)$, point $B(19, k)$ and point $C(7, 0)$. What is the value of $k$?
Answer:
Let's think step by step.

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A line goes through point $A(9, 1)$, point $B(19, k)$ and point $C(7, 0)$. What is the value of $k$?
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