A line chart can display continuous data that changes with units (for example, unit time) and is therefore well suited for displaying trends in data at equal time intervals.
A scatter chart shows the relationships between values in several data series, or draws two sets of numbers as a series of XY coordinates.
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In a line chart, category data is evenly distributed along the horizontal axis, and all value data is evenly distributed along the vertical axis.
A scatter plot has two value axes that display a set of numeric data along the horizontal axis (x axis) and another set of numeric data along the vertical axis (Y axis). Scatter plots combine these values into a single data point and display them at uneven intervals or clusters. Scatter plots are often used to display and compare values, such as scientific data, statistical data, and engineering data.
The difference between a scatter chart and a line chart in Excel (scatter chart time evenly distributed)