Question

which of the following must all graphs include? only numbers on the x axis a title, labeled x and y axes with units a summary paragraph a legend for every data point

Explanation:

• For the option "Only numbers on the X axis": Not all graphs have only numbers on the X - axis (e.g., a graph with categorical data on the X - axis).
• For the option "A title, labeled X and Y axes with units": A good graph should have a title to describe what the graph is about, and labeled X and Y axes with units (if applicable) to make the data being presented clear. This is a fundamental requirement for most graphs (including scientific, business, etc. graphs) to be understandable.
• For the option "A summary paragraph": Graphs do not need a summary paragraph; they are visual representations of data, and a summary paragraph is not a standard part of a graph.
• For the option "A legend for every data point": A legend is for differentiating between different data series or groups, not for every single data point. Having a legend for every data point is unnecessary and not a standard graph requirement.

Answer:

B. A title, labeled X and Y axes with units