Use the image to answer the question.
An illustration shows a bar graph titled Math Club Membership. The x-axis lists the years from 2015 through 2021. The y-axis shows Number of Members and ranges from 0 to 40 in 10-unit increments. The graph shows the following membership totals: 2015, 22; 2016, 25; 2017, 36; 2018, 30; 2019, 32; 2020, 28; 2021, 30.
The graph shows the number of members of the Math Club from the years 2015 to 2021. Find the range.
(1 point)