Answer:
i will choose b
Step-by-step explanation:

(a) For dx/dt=6, dy/dt = 2·6 = 12
(b) For dy/dt=2, 2 = 2·dx/dt ⇒ dx/dt = 1
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The value of x is irrelevant for this question.
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If your function is 2^x +1 or 2^(x +1), it needs to be written as such. The answer above applies to the function given.
Teachers and principles probably still want to keep school a little old fashioned while still having little technology by the next year or 2 we'll might not have to carry heavy backpacks anymore I wish you the best of luck.
Most of the work is already done for you. Take that " 45w+155 ", write '6' in place of 'w', and simplify it.