Analysis of Student Transportation Preferences

A survey was conducted among students regarding their preferred mode of transportation to school. The results were displayed in a line graph, showing changes over four weeks:

Over the four weeks, the following trends were observed:

• Week 1: 40% walked, 30% rode bicycles, 20% were driven by parents, 10% took public transport.
• Week 2: 35% walked, 25% rode bicycles, 25% were driven by parents, 15% took public transport.
• Week 3: 30% walked, 30% rode bicycles, 25% were driven by parents, 15% took public transport.
• Week 4: 25% walked, 35% rode bicycles, 30% were driven by parents, 10% took public transport.

Using the information from the line graph, which of the following statements is true regarding the change in student transportation preferences over the four weeks?