For Exercise 22 and 23, use the following information.

Sarah has a long-distance telephone plan where she pays 10 cent for each minute or part of a minute that she talks, regardless of the time of day.

Graph a step function that represents this situation.

The graph of a step function contains all constant pieces, and these pieces are observed across the adjacent intervals of the function. Their values change form one interval to another.

It is given that she pays 10 cents for each minute.

Let x be the total number of minutes.

If call duration is greater than 0 minutes but less than or equal to 1 minute, then the call cost of the call will be 10 cents.

If call duration is greater than 1 minutes but less than or equal to 2 minute, then the call cost of the call will be 20 cents and so on.

Thus, the required table is shown below:

Since, the call rounds any fraction of minute up to the next whole number, each segment on the graph has a circle at the left endpoint and a dot at the right endpoint.