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My name is Ann [436]
3 years ago
5

Why is the answer A ?why can't D work?

Mathematics
1 answer:
attashe74 [19]3 years ago
7 0
The negative in a = -2 for answer A represents a reflection over the x-axis.
What does the cosine graph usually look like?.....It goes through point (0,1) and decreases.
The graph shown goes through point (0,-2). Since there are no vertical or horizontal shifts, the graph has an amplitude of 2 and reflects over the x-axis.

a=2 for answer D does not represent the reflection over the x-axis.


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