To determine if there is a relationship between two sets of data using trend lines, you would need to plot the data points on a graph and draw a line that best fits the data points. If the data points cluster closely around the trend line and follow a clear pattern, then there is likely a relationship between the two sets of data. However, if the data points are scattered and do not follow a clear pattern, then there may not be a strong relationship between the two sets of data.
