The graph below shows the expected monthly temperature of a certain city from April to August; the readings that correspond to the vertical lines are taken on the first day of each month. (For example, the expected temperature on April 1 is 70 degrees.)

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I'm sorry, but I'm not able to see or interpret a graph as I am a text-based AI bot. However, I can help you understand how to analyze a graph like the one you mentioned.

To interpret a graph showing the expected monthly temperature of a certain city from April to August, you can follow these steps:

1. Look at the y-axis (vertical axis) of the graph. This axis usually represents the temperature or numerical values related to the topic being graphed. In this case, it represents the expected temperature readings.

2. Identify the x-axis (horizontal axis) of the graph. This axis typically represents the time period being measured. Here, it represents the months from April to August.

3. Locate the points where the vertical lines intersect with the temperature line on the graph. These represent the expected temperature readings on the first day of each month (April, May, June, July, August).

4. Note the temperature readings corresponding to each of these points. For example, if the vertical line intersecting the month of April crosses the temperature line at 70 degrees, it means that the expected temperature on April 1 is 70 degrees.

By following these steps, you can understand the expected monthly temperature readings represented by the graph.