Complete the recursive formula of the arithmetic sequence 12, 10, 8, 6,
6(1) = _

6(n) = b(n − 1) + _

6(1) = 12 and 6(n)=b(n-1)+(-2)

Step-by-step explanation:

12 is the first term, -2 is the ratio

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Here we have four points:   {(-2,6), (-3,7), (-4,8), (-3,10)}.  Two of them have the same x-coordinate (-3).  Thus, this is not a function.  Another way to look at this:  If x = -3, then y = 7 or y = 10.  If there is more than one y-value associated with any x-value, then what you have is not a function.