Scatter Plots and Trend Lines

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 axis.

Front

What does a trend line represent in a scatter plot?

Back

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

Front

What is correlation in the context of scatter plots?

Back

Correlation refers to the relationship between two variables, which can be positive, negative, or none.

Front

What does a positive correlation look like on a scatter plot?

Back

A positive correlation appears as an upward slope, where as one variable increases, the other variable also increases.

Front

What does a negative correlation look like on a scatter plot?

Back

A negative correlation appears as a downward slope, where as one variable increases, the other variable decreases.

Front

What does 'no correlation' mean in a scatter plot?

Back

No correlation means there is no discernible relationship between the two variables, and the data points are scattered randomly.

Front

How do you determine the line of best fit?

Back

The line of best fit is determined by minimizing the distance between the line and all the data points in the scatter plot.

Front

What is the purpose of using a line of best fit?

Back

The line of best fit helps to predict values and understand the relationship between the variables in a scatter plot.

Front

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

Back

The equation of a line in slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

How can you estimate a value using a scatter plot?

Back

You can estimate a value by locating the corresponding x-value on the scatter plot and finding the y-value on the trend line.