Line Graphs

Front

What is a line graph?

Back

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.

Front

How do you read a line graph?

Back

To read a line graph, look at the x-axis (horizontal) for the independent variable and the y-axis (vertical) for the dependent variable. Follow the lines to see how the values change.

Front

What does the slope of a line on a graph represent?

Back

The slope of a line on a graph represents the rate of change between the two variables. A steeper slope indicates a greater rate of change.

Front

What does it mean if a line on a graph is horizontal?

Back

A horizontal line on a graph indicates that there is no change in the dependent variable as the independent variable changes.

Front

What does it mean if a line on a graph is vertical?

Back

A vertical line on a graph indicates that the independent variable does not change, which is not typical for a line graph.

Front

How can you find the difference between two points on a line graph?

Back

To find the difference between two points on a line graph, locate the two points, read their values on the y-axis, and subtract the smaller value from the larger value.

Front

What is the purpose of using a line graph?

Back

The purpose of using a line graph is to visually represent data over time, making it easier to identify trends, patterns, and changes.

Front

What type of data is best represented by a line graph?

Back

Line graphs are best for continuous data that changes over time, such as temperature, speed, or population.

Front

What is an independent variable in a line graph?

Back

The independent variable is the variable that is changed or controlled in an experiment to test its effects on the dependent variable, usually plotted on the x-axis.

Front

What is a dependent variable in a line graph?

Back

The dependent variable is the variable that is measured and affected in the experiment, usually plotted on the y-axis.