Here is some student work from a recent project I conducted on fitting curves to images in Geogebra. The details of the assignment can be found here, and more examples of student work can be seen on my Facebook page.
Students were asked to find pictures and use Geogebra to fit trigonometric curves to the images using transformations. Here are some of the results.
Smart Water = Smart Curves
My Good-Looking Windowsill
Sine of Camel Humps
Overall, I was really impressed with the creativity the students showed, and their facility with fitting these curves to the forms! A mathematical and artistic success in my book.