Algebra-2

1. Check for direct variation:

   - In direct variation, the equation is .

   - For the first pair (1, 5), if we substitute into the equation , we get , so .

   - For the second pair (3, 15), . Since , this equation holds true.

   - For the third pair (6, 30), . With , this is also correct.

   - For the fourth pair (9, 45),

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