It is not enough to convince the infesters that the team is able to realize their ideas. First of all, you need to convince them that the idea by itself is very important, that it brings profit and it is useful to society. The idea should be in demand, investors should understand that many people need the project. To do this, it is necessary to analyze the industry, identify existing problems and show how the project will be in demand in the future. To do these it is better to use the numbers, calculations, comparisons. For better understanding of the size of market and the need for the product, it is better to use the graphs, tables, charts. The market can be huge, but it can have tens or hundreds of competitors. It is necessary to inform about the competitors and explain to investors how the project will be differ from the competitors.