Line Sparkline is one of the mini charts in a single cell, representing the trend of data that you have selected. Please see how to insert line sparklines. When you create the line sparklines, they come as a group. Please see the steps below to ungroup them:
Step 1: Select any cell with line sparklines;
Step 2: Click the "Design" tab from the Ribbon;
Step 3: Click the Ungroup command from the "Group" area;
Step 4: The line sparklines will ungroup;
Step 5: You can change any cell with a different type of sparkline.