I'm working on an assignment in Managing Business Strategy and Uber will be the organization that I need to draft an action plan / strategic plan, one of the request quoting "Use appendices to provide detailed supporting evidence and integrate key points from the appendices into your answers." --> would that means I need to  provide chart, figures, news clip as appendices here?  

The appendix consists of subsidiary matter at the end of the document in this case the strategic plan which may be helpful in providing a more comprehensive understanding of the research problem and/or is information which is too cumbersome to be included in the body of the paper.

You should use it to cover data or details that aren't essential to your work, but which could provide useful context or background material.

Here i have attached examples of appendices that several strategic plans have

University of montana Strategic plan

• Appendix A: Efficiency in Information Technology
• Appendix B: Trends
• Appendix C: SWOT analysis detail
• Appendix D: Central IT mission, vision and values
• Appendix E: Excerpts from the Lab Committee report
• Appendix F: Academic Affairs, Student Affairs priorities
• Appendix G: Governance proposal

Georgia State Univesity Strategic plan

• Appendix A. Preparation & Process of Developing the Georgia State University Strategic Plan
• Appendix B. SWOT analysis
• Appendix C. Discussion paper prepared on research centers
• Appendix D. The Huron Report on administrative support for the conduct of research
• Appendix E. Discussion paper prepared on the University Library
• Appendix F. Executive Summary of the University Diversity Strategic Plan
• Appendix G. Metrics for measuring progress toward meeting strategic goals

You will notice they are more technical and not very essential in the whole plan but may form part of the required documents.

However the requireent that the appencicies should be integrate key points from the appendices into your answers.

this means that you should not use this section to just dump unnecessary materials that are not relevant to the plan. As such in the discussion or plan the instructor expects that you will refer to all appendices. You could also use this section to refer to materials such as proforma or projected financials.

Note that charts and figures may still be included in the report without putting them into the appendices especially where they are very essential to the report and its expected that there will be several charts, figures and table properly labelled and referenced.