x-8 is not a factor of 
Step-by-step explanation:
In order to check whether a term is factor of given expression or not we put the value in the expression. If the expression is zero, then the value is a factor otherwise not.
Given polynomial is:

We have to check if x-8 is factor of given polynomial or not. for that purpose we have to put

Putting in the polynomial

Hence,
x-8 is not a factor of 
Keywords: Polynomials, expressions
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A. -1
(1,2) and (2,1)
slope = 2 -1 / 1 -2
slope = 1 / -1
slope = -1
I believe the answer is B for this question
Answer:
I'm not sure if it's the second or the last one