Calculus Practice

I'm trying to incorporate more AP Calculus multiple choice style questions throughout the year this year. I've scanned for various released documents and then changed them up with different problems but same intent. I guess this is kosher. We are not supposed to publish secure documents or let the kids take them home. I have not done that, but then I still am feeling antsy because the kernel of the ideas came from secure documents. Anyone have an opinion on that?

Here is what we/they had for homework recently. I like my last question (not from another source). I realized that the students were still not clear on the distinction between the derivative being the GENERAL tangent slope equation for ANY x versus a SPECIFIC slope at a SPECIFIC x using the general equation.