### Home > CCA2 > Chapter 7 > Lesson 7.2.4 > Problem 7-158

7-158.

to get the graph at right, but she wondered if it would be possible to get the same graph by shifting

*.*

Is it possible to write a cosine function for this graph?

Yes, it is.

If you think it is possible, find an equation that does it. If you think it is impossible, explain why.

The graph of

starts at a maximum. This graph has a maximum atAdlai said,

*“I can get that graph*without*shifting to the right or left.”*What equation did he write?