A combination chart in Excel blends two or more chart types, such as a column and line chart, into a single visual. Its ideal ...

However, do you know that you can make a curved line graph in Excel or Google Sheets ... For that, click on the Chart, expand the Chart type drop-down menu, and select something under the Line ...

The scale on the left graph is inappropriate. The numbers go up higher than necessary on both axes. This means the points are squashed into a small part of the graph area and are difficult to read ...