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. Find the point where the two values intersect.

Front

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

Back

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

Front

What is the purpose of a title in a line graph?

Back

The title of a line graph explains what the graph is about, providing context for the data being presented.

Front

What are the axes in a line graph?

Back

The axes in a line graph are the two lines that form the graph: the x-axis (horizontal) and the y-axis (vertical). They represent the variables being compared.

Front

How do you plot a point on a line graph?

Back

To plot a point on a line graph, find the value on the x-axis and the corresponding value on the y-axis, then mark the point where they intersect.

Front

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

Back

A horizontal line on a graph indicates that the dependent variable does not change as the independent variable changes; it remains constant.

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 as the dependent variable changes; it is undefined in terms of slope.

Front

How can you determine the increase or decrease in a line graph?

Back

You can determine the increase or decrease by observing the direction of the line: if it goes up from left to right, it is increasing; if it goes down, it is decreasing.

Front

What is a data point in a line graph?

Back

A data point in a line graph is a specific value that represents the relationship between the two variables at a given time or condition.