Scatterplots and Trendlines

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional plane.

Front

What does a trendline represent in a scatterplot?

Back

A trendline is a line that best fits the data points in a scatterplot, indicating the general direction or trend of the data.

Front

How can you use a trendline to make predictions?

Back

You can use a trendline to predict values by extending the line and finding the corresponding value on the other axis.

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 no correlation?

Back

No correlation means there is no apparent relationship between the two variables; changes in one do not affect the other.

Front

What is the correlation coefficient?

Back

The correlation coefficient is a numerical measure that indicates the strength and direction of a linear relationship between two variables.

Front

How do you interpret a correlation coefficient of -0.8?

Back

A correlation coefficient of -0.8 indicates a strong negative correlation between the two variables.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess relationships between variables, identify trends, and make predictions.

Front

If a scatterplot shows a downward trend, what type of correlation is present?

Back

A downward trend in a scatterplot indicates a negative correlation.