Scatterplots

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 axis.

Front

What does a negative correlation in a scatterplot indicate?

Back

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

Front

What does a positive correlation in a scatterplot indicate?

Back

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

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, showing the trend of the data.

Front

How do you determine the slope of a line of best fit?

Back

The slope of a line of best fit is calculated by taking the change in the y-values divided by the change in the x-values between two points on the line.

Front

What is the equation of a line in slope-intercept form?

Back

Front

What does the y-intercept represent in a scatterplot?

Back

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

Front

How can you estimate a value using a scatterplot?

Back

You can estimate a value by locating the corresponding x-value on the scatterplot and finding the associated y-value along the trend line.

Front

What is the purpose of using a scatterplot?

Back

The purpose of using a scatterplot is to visually represent the relationship between two variables and to identify trends or patterns.

Front

What does it mean if the points on a scatterplot are widely spread out?

Back

If the points are widely spread out, it indicates a weak correlation between the two variables.