1. The problem is to represent the number of apples sold over 4 days using a bar graph. 2. A bar graph visually displays data with rectangular bars where the length of each bar is proportional to the value it represents. 3. Here, the x-axis will represent the days (Mon, Tue, Wed, Thu) and the y-axis will represent the number of apples sold. 4. The data points are: Mon = 20, Tue = 35, Wed = 30, Thu = 25. 5. To plot this, draw four bars with heights corresponding to these values. 6. This graph helps to quickly compare the number of apples sold each day.