Scatter Plots

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 positive correlation indicate in a scatter plot?

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 scatter plot?

Back

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

Front

What is no correlation in a scatter plot?

Back

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

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 the type of correlation from a scatter plot?

Back

You can determine the type of correlation by observing the direction of the data points: upward for positive, downward for negative, and scattered for no correlation.

Front

What does the slope of a line of best fit represent?

Back

The slope of a line of best fit represents the rate of change between the two variables in the scatter plot.

Front

What is the formula for a linear equation in slope-intercept form?

Back

The formula is y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the significance of the y-intercept in a scatter plot?

Back

The y-intercept is the value of y when x is zero; it indicates where the line of best fit crosses the y-axis.

Front

How do you identify outliers in a scatter plot?

Back

Outliers are data points that fall far away from the general pattern of the other points in the scatter plot.