It is a function because when the x’s repeat then it's a none function
A difference of 840 degrees
800 - (-40) = 840
When removing a negative number from a positive number you get a positive
- + - = +
800 - (-40)
^ ^
Negatives (2)
When n = 3,
n + 11
= 3 + 11
= 14
The circumference of a circle is the distance around the outside of the circle. The diameter is the distance across the circle. It must pass through the center or the circle. For any circle, regardless of diameter, there is a consistent ratio between the circle's circumference and the length of its diameter.
Answer: Choice D

This basically says "the nth term is found by computing math, aka evaluating some function, based on the (n-1)th term".
As an example, we could have a function that simply squares the input
Let's say we started at 5. It squares to 25 which in turns squares to 625, and so on. Each new term is based on the old term. Namely, we squared the old n-1 term to get the new nth term.