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AMC 12 2024a Problem 25

  • Paper

A graph is symmetric\textit{symmetric} about a line if the graph remains unchanged after reflection in that line. For how many quadruples of integers (a,b,c,d)(a,b,c,d), where ∣a∣,∣b∣,∣c∣,∣d∣≤5|a|,|b|,|c|,|d|\le5 and cc and dd are not both 00, is the graph of y=ax+bcx+dy=\frac{ax+b}{cx+d}symmetric about the line y=xy=x?

(A) 1282(B) 1292(C) 1310(D) 1320(E) 1330\textbf{(A) }1282 \textbf{(B) }1292 \textbf{(C) }1310 \textbf{(D) }1320 \textbf{(E) }1330

Dataset text AMC 12 2000 to 2025. Quoted with source.

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B

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