A) Decide if the graph is discrete or continuous. b) Give the domain and range of the graph.
c) Decide if the graph is a function. Explain.

  a) discrete

  b) D: {1, 2, 3}; R: {3, 4}

  c) is a function

Step-by-step explanation:

When the graph is made up of individual dots, it represents a discrete function.

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The domain is the set of x-coordinates of the points on the graph:

  domain: (1, 2, 3}

The range is the set of y-coordinates of the points on the graph:

  range: {3, 4}

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No vertical line intersects the graph in more than one place, so the graph is a function.

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0