If y is directly proportional to x, and when x = 2, y = 20, what is the value of y when x = 9?

Question: If y is directly proportional to x, and when x = 2, y = 20, what is the value of y when x = 9?

A. 20
B. 35
C. 45
D. 90 ✓

Correct Answer: D. 90

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