Answer:
9000 feet altitude
Explanation:
Given that the y-value for this situation represents altitude in thousands of feet, you want to know what the y-value of the point of intersection represents.
Meaning
The problem statement tells you the meaning of the y-value anywhere. It is "altitude in thousands of feet."
The point of intersection is (2, 9), where the x-value is time in minutes.
The y-value of 9 at the point of intersection represents an altitude of 9000 feet.
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Additional comment
This is an exercise in reading comprehension.