Answer:
2.19
Step-by-step explanation:
<u><em>Answer</em></u>

<u><em>Explanation</em></u>
Based on the given conditions, formulate:: 
Substitute
into
:: 
Rearrange variables to the left side of the equation: 
Calculate the sum or difference: 
Divide both sides of the equation by the coefficient of variable: 
Cross out the common factor: 
Answer:
D
Step-by-step explanation:
C and D are the location for -1 and 1
....-2 -1 0 1 2 ...
I think it’s F I’m not sure if it’s correct !