Several concentrated solutions of a weak monoprotic acid were prepared, and their pH values were recorded. When a graph of pH versus the base-10 logarithm of initial concentration was constructed, it was found to be linear. By name or number, identify all of the following three statements that are true regarding this graph: 1) The slope is -1/2 2) The intercept is the pKa of the acid 3) Except for having an intercept of 0, this graph would be the same for a strong monoprotic acid