Analyzing Vehicle Sales Data

The following bar graph illustrates the number of vehicles sold by a dealership over the last five months. The horizontal axis represents the months from January to May, while the vertical axis represents the number of vehicles sold.

In January, 20 vehicles were sold. In February, sales increased to 35 vehicles. March saw a slight decline with 30 vehicles sold. In April, sales rose again with 40 vehicles, and finally, in May, the dealership sold 25 vehicles.

Using the information provided in the graph, answer the following question: