Line Graphs

A line graph is a type of chart that displays information as a series of data points called 'markers' connected by straight line segments. It is used to show trends over time.

The x-axis (horizontal axis) typically represents the independent variable, often time or categories.

The y-axis (vertical axis) usually represents the dependent variable, which is the value being measured.

To read a line graph, locate the x-axis to find the category or time period, then move up to the line to see the corresponding value on the y-axis.

A flat line indicates that there is no change in the value of the dependent variable over the time period represented.

An upward slope indicates an increase in the value of the dependent variable as the independent variable increases.

A downward slope indicates a decrease in the value of the dependent variable as the independent variable increases.

The title provides a clear description of what the graph represents, helping viewers understand the data being presented.

The highest point on a line graph is where the line reaches its maximum value on the y-axis.

A data point is a specific value plotted on the graph, representing the relationship between the independent and dependent variables.