Though it was supposed to be a high-tech graphing calculator for the high school students, I remember the only graphs I was busy plotting with the calculator was those I've already known. The cosine, sine and tangent. One of them look like "2 mini mountains"! Even that can make people laugh for the whole day. Silly -.-"
Guess how advanced the graphing calculator nowadays, not only they can plot some "mountains" but they were able to make them 3D! You'd be wrong if you think only the engineering and science students will be drooling over such devices, but even the business students are benefiting from such tool too.
If I ever touched one of those again, I think the only graph I can ever plot will be those I've been plotting 10 yrs ago. What a shame! But well, at least "the mountains" and "'the valleys" (that were formed by the graphs sometimes) are pretty entertaining too.