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Answer:

  see attached

Step-by-step explanation:

A graph of direct variation is a straight line through the origin. It may have positive, negative, or zero slope. (The slope may not be "undefined.")

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The fourth graph or the last one represents a function of direct variation.

What is direct variation?

Direct Variation is said to be the relationship between two variables in which one is a constant multiple of the other.

In other words, as x increases, y increases, which is evident in the last graph as well.

Learn more about direct variation here

https://brainly.com/question/14254277

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