Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.

Front

What does a 'Line of Best Fit' represent in a scatterplot?

Back

A 'Line of Best Fit' is a straight line that best represents the data on a scatterplot, showing the trend of the data points.

Front

What does a positive association in a scatterplot indicate?

Back

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

Front

What does a negative association in a scatterplot indicate?

Back

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

Front

What does 'no association' mean in a scatterplot?

Back

'No association' means that there is no discernible relationship between the two variables; changes in one do not affect the other.

Front

How do you determine the slope of a line in a scatterplot?

Back

The slope is determined by the change in the y-value divided by the change in the x-value between two points on the line.

Front

What is the y-intercept in a linear equation?

Back

The y-intercept is the value of y when x is 0; it is where the line crosses the y-axis.

Front

Write the slope-intercept form of a linear equation.

Back

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

Front

How can you use a trend line to make predictions?

Back

You can use a trend line to estimate the value of one variable based on the value of another variable by finding where the point falls on the line.

Front

What is the purpose of a scatterplot?

Back

The purpose of a scatterplot is to visually display the relationship between two quantitative variables.