Two telephone poles are 100 feet apart. If we had a telephone wire stretched taut between the two poles, we would have 100 feet of telephone wire. (We are ignoring any stretching of the wire that would normally occur.)Now, imagine that we add 1 foot of slack to the telephone wire between the two poles.

Remember that since the wire was originally 100 feet, now that we added a foot of slack, the wire is 101 feet.

If we were solving for this length on a graph, how would we do it?