For this case we have the following polynomial:

The standard form of the polynomial is given by:

Where, the axis of symmetry of the polynomial is given by the expression:
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In this case we have:

Therefore, replacing values we have:

Rewriting we have:

Answer:
The symmetry axis of the polynomial is given by:

option C
F(x)=2x
f(3x)=2*(3x)=6x the slope will be bigger, so it will grow faster
Part A: The probability is 1/6. This is because there are six options in total, and only one of those options is 6.
Part B: The probability is 6/6, or alternatively 100%. This is because that the probability of rolling a 6 is 1/6, and the probability of rolling any of the other options is 5/6. Adding them together gives a probability of 6/6.
Part C: The probability is 5/6. This is because there are six options, and of those, five of them are not 6.