The slope of tangent to the curve \( x=t^{2}+3 t-8, y=2 t^{2}-2 t-5...

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The slope of tangent to the curve \( x=t^{2}+3 t-8, y=2 t^{2}-2 t-5 \) at the point \( (2,-1) \) is:
P
(A) \( \frac{22}{7} \)
(B) \( \frac{6}{7} \)
(C) \( \frac{-6}{7} \)
(D) \( -6 \)
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