What type of data will they need to collect and what tools will most likely be used

Two of the tools you can use are the scatter plot, the linear graph.

Explanation:

The scatter diagram allows the study of the relationships between two sets that are associated with data that are in pairs (x, y), one in each set. The relationships given between these two data sets are deduced from the shape of the clouds. Among its main uses is discovering and teaching the relationships between two sets of data.

While the linear graph is composed of a series of data that are represented by points, joined by lines. Using this graph you can show the change in the trend of the data.