Question

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.

Answer 1

a) discrete

b) D: {1, 2, 3}; R: {3, 4}

c) is a function

Explanation:

a)

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

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b)

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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c)

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