Math 8 - Scatterplots and Trend Lines (Flashcard 11.2)

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two variables by displaying data points on a two-dimensional grid.

Front

What is a trend line?

Back

A trend line is a straight line that best represents the data on a scatter plot, indicating the general direction of the data points.

Front

How do you determine the line of best fit?

Back

The line of best fit is determined by visually assessing which line minimizes the distance between itself and all the data points.

Front

What does the slope of a trend line represent?

Back

The slope of a trend line represents the rate of change between the two variables being compared.

Front

How can you use a trend line to make predictions?

Back

You can use a trend line to predict values by extending the line and finding where it intersects with the value of interest.

Front

What does a positive slope indicate in a scatter plot?

Back

A positive slope indicates that as one variable increases, the other variable also increases.

Front

What does a negative slope indicate in a scatter plot?

Back

A negative slope indicates that as one variable increases, the other variable decreases.

Front

What is the purpose of using scatter plots in data analysis?

Back

Scatter plots are used to visually assess relationships between variables and identify trends or patterns in data.

Front

What is the significance of outliers in a scatter plot?

Back

Outliers are data points that differ significantly from other observations and can affect the trend line and overall analysis.

Front

How do you interpret the y-intercept of a trend line?

Back

The y-intercept is the value of the dependent variable when the independent variable is zero, indicating the starting point of the trend.