scatterplots basics 1

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 in a scatter plot indicate?

Back

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

Front

What does a negative correlation in a scatter plot indicate?

Back

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

Front

What does no correlation mean 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 line of best fit visually?

Back

You can determine the line of best fit by drawing a line that has approximately equal numbers of points above and below it.

Front

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

Back

Front

What does the slope of a line represent in a scatter plot?

Back

The slope of a line represents the rate of change between the two variables; a steeper slope indicates a stronger relationship.

Front

What is the y-intercept in a scatter plot?

Back

Front

How do you identify a positive correlation in a scatter plot?

Back

A positive correlation is identified when the data points trend upwards from left to right.