well, the recursive rule of aₙ = aₙ₊₁ + 7, where a₁ = 15, is simply saying that
we start of at 15, and the next term is obtained by simply adding 7, and so on.
well, that's the recursive rule.
so then let's use that common difference and first term for the explicit rule.

Aahwheheehheheheheheheheheheuww
Answer:
Down here ↓↓↓↓↓↓
Step-by-step explanation:
13:
It is a function, notice that if you draw a vertical line anywhere, it doesn't pass two points.
Domain : All real numbers (x-values)
Range : 2 (y-values)
14:
Not a function, if you draw a vertical line through one point, it will hit two others.
Domain : -3
Range : 4 , 0, -4
15:
It is a function, no two points in any vertical line.
Domain: All real numbers
Range: All real numbers
16:
Not a function, two points in one line
Domain : -5 ≤ x ≤ 5
Range: -2 ≤ y ≤ 2
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-Chetan K
The answer to 188x31 is 5,828