Final answer:
The data representing who people voted for in the last presidential election is categorical because it classifies voters based on their choice of candidates.
Step-by-step explanation:
The type of data that represents who people voted for in the last presidential election is categorical. This is because it deals with names or labels and not numerical values. For instance, voters may choose between candidates such as 'Democrats' or 'Republican', and these choices categorize their responses. This type of data cannot be quantitatively measured; rather, it is used to classify individuals based on their choices. The choices are categories or groups representing the candidates, and each person falls into one of these categories based on their vote.