Question 53618
1.Which one of the basic functions (linear, quadratic, rational, or exponential) is related to the arithmetic sequence? 
It is a function because there is a unique term value corresponding
to the number of each term.  That means the 1st term has a value,
the 2nd has a value, etc.
The function is linear following the form f(n)=d(n-1)+a
d is the slope.
-------------------
2.Which one of the basic functions (linear, quadratic, rational, or exponential) is related to the geometric sequence? 
It is exponential because f(n)=ar^(n-1); the variable is in the exponent.
-------------
3. Give at least two real-life examples of a sequences or series. One example should be arithmetic, and the second should be geometric.
Simple interest is an arithmetic sequence.
P, P+I, P+2I, P+3I, etc; where P is the original investment and I is the interest.
Compound interest is an arithmetic sequence.
P, P(1+r), P(1+r)^2, P(1+r)^3, etc. 
Cheers,
Stan H.