Answer:
(a) Arithmetic Sequence
Explanation:
You want to know if the graph of a straight line represent an arithmetic, geometric, or neither sequence.
Arithmetic sequence
An arithmetic sequence is characterized by a common difference between terms that are 1 unit apart. A graph of an arithmetic sequence is points that lie on a straight line.
The graph shows an Arithmetic Sequence.
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Additional comment
A graph of a geometric sequence would show points that lie on an exponential curve.