Scatter Plot & Line of Best Fit Practice

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 nonlinear scatter plot indicate?

Back

A nonlinear scatter plot indicates that the relationship between the variables does not follow a straight line.

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatter plot, showing the trend of the data.

Front

How do you determine the slope of the line of best fit?

Back

The slope of the line of best fit is determined by the change in the y-values divided by the change in the x-values between two points on the line.

Front

What does a positive association in a scatter plot mean?

Back

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

Front

What does a negative association in a scatter plot mean?

Back

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

Front

What is the y-intercept in the equation of a line?

Back

The y-intercept is the value of y when x is zero, representing where the line crosses the y-axis.

Front

How can you use a scatter plot to make predictions?

Back

You can use a scatter plot to make predictions by extending the line of best fit to estimate values for variables not directly measured.

Front

What is the equation of the line of best fit for the data: y = 5x + 25?

Back

The equation of the line of best fit is y = 5x + 25.

Front

If a scatter plot shows a trend where more classes missed leads to lower exam scores, what type of association is this?

Back

This is a negative association.