Scatter Plots & Best Fit 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 line of best fit represent in a scatter plot?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, indicating the trend of the data points.

Front

What is positive correlation in a scatter plot?

Back

Positive correlation occurs when an increase in one variable leads to an increase in another variable, resulting in an upward trend in the scatter plot.

Front

What is negative correlation in a scatter plot?

Back

Negative correlation occurs when an increase in one variable leads to a decrease in another variable, resulting in a downward trend in the scatter plot.

Front

What does no correlation mean in a scatter plot?

Back

No correlation means there is no apparent relationship between the two variables, and the data points do not show any clear trend.

Front

How can you use a scatter plot to make predictions?

Back

You can use a scatter plot to make predictions by drawing a line of best fit and using it to estimate values for one variable based on the other.

Front

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

Back

A trend line helps to summarize the relationship between the variables and can be used to make predictions about future data points.

Front

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

Back

A downward trend in a scatter plot indicates a negative correlation.

Front

How do you determine the value of a variable using a line of best fit?

Back

To determine the value of a variable using a line of best fit, locate the value on the x-axis, then find the corresponding point on the line to read the value on the y-axis.

Front

What is the significance of outliers in a scatter plot?

Back

Outliers are data points that differ significantly from other observations and can affect the slope and position of the line of best fit.