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TIME REMAINING
49:15
When developing a written argument, what best explains why an author would use a graph as a source?

A graph gives numeric evidence visually.
A graph is easy to read and understand.
A graph is colorful and will engage the reader.
A graph can be used to refute an argument.

A graph gives numeric evidence visually or a graph is colorful and will engage the reader.

Explanation:

It honestly could be neither of those but i just assumed it was because the author might be using visuals to grab the reader's attention or it could be to help them visualize what's going on.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)