Making Predictions and Reading Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.

Front

What does a positive correlation indicate in a scatterplot?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative correlation indicate in a scatterplot?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatterplot, used to make predictions.

Front

How can you determine if a line of best fit is accurate?

Back

You can determine if a line of best fit is accurate by checking how closely the data points cluster around the line.

Front

What is the purpose of making predictions using a scatterplot?

Back

The purpose is to estimate the value of one variable based on the value of another variable.

Front

If a scatterplot shows no correlation, what does that mean?

Back

It means there is no apparent relationship between the two variables being analyzed.

Front

What is the significance of the slope of the line of best fit?

Back

The slope indicates the rate of change between the two variables; a steeper slope means a stronger relationship.

Front

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

Back

The y-intercept is the value of the dependent variable when the independent variable is zero.

Front

What does it mean if a scatterplot has a cluster of points?

Back

A cluster of points indicates that there is a concentration of data points in that area, suggesting a possible relationship.