<span>The correct answer is that y does not vary directly with x.
Explanation<span>:
If y varies directly with x, this means that it would fit the equation y=kx for every point in the set.
For the first point, we would have 11=7k; this would mean that k=11//7.
For the second point, we would have 13=8k; this would mean that k=13/8.
Checking using proportions shows us that 11/7 does not equal 13/8:
cross multiply, and you have 11*8=7*13, or 88=91.
This is not true, so k is not a constant, and y does not vary directly with x.</span></span>
Answer:
The function is never decreasing.
Step-by-step explanation:
The function is never decreasing because as x increases, y also increases.
Unique pair of dates...use "n choose k" formula:
n!/(k!(n-k)!), n=number of total possible choices, k=number of selections
365!/(2!(363!))
66430 unique combinations
