It isn't creative or an acronym, but tangents have only ONE point of intersection. This hardly can be construed as an average of anything.
Well the reason is because for one of my text book questions "You have studied how secants relate to average rates of change and how tangents relate to instantaneous rates of change. Find a creative way - a diagram, an acronym, or a jingle for example -- to make this easier to remember. I have no creativity and I'm absolutely stomped, and I'm hoping there are some creative members on this forum that can help me.