Line Graphs

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

A line graph typically shows how a quantity changes over time.

The x-axis is the horizontal line on a graph that usually represents the independent variable, such as time.

The y-axis is the vertical line on a graph that usually represents the dependent variable, such as quantity or amount.

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

If a line on a graph is increasing, it means that the value of the dependent variable is going up as the independent variable increases.

If a line on a graph is decreasing, it means that the value of the dependent variable is going down as the independent variable increases.

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

The title of a line graph explains what the graph is about, helping the viewer understand the data being presented.

A trend is the general direction in which the data points are moving, such as upward, downward, or stable.