Scatter plots and line of best fit

Front

What is a scatter plot?

Back

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

Front

What does a strong positive correlation in a scatter plot indicate?

Back

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

Front

What does a weak negative correlation in a scatter plot indicate?

Back

A weak negative correlation indicates that as one variable increases, the other variable tends to decrease, but the relationship is not strong.

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 scatter plot, showing the general direction of the data points.

Front

How can you determine if a scatter plot has a line of best fit?

Back

A scatter plot has a line of best fit if the data points are closely aligned along a straight line, indicating a clear trend.

Front

What does it mean if there is no relationship in a scatter plot?

Back

If there is no relationship, the data points are scattered randomly, and changes in one variable do not predict changes in the other.

Front

What is the purpose of using a trend line in a scatter plot?

Back

A trend line helps to visualize the overall direction of the data and can be used to make predictions about future data points.

Front

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

Back

The slope indicates the rate of change between the two variables; a positive slope means both variables increase together, while a negative slope means one variable decreases as the other increases.

Front

What does the y-intercept represent in the equation of a line of best fit?

Back

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

Front

How can you use a scatter plot to make predictions?

Back

You can use the line of best fit to estimate the value of one variable based on the value of another variable.