Scatterplots and Trend Lines Review

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does the line of best fit represent in a scatterplot?

Back

The line of best fit represents the trend in the data, showing the general direction that the data points follow.

Front

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

Back

The slope of a line is determined by the change in the y-values divided by the change in the x-values (rise over run).

Front

What does a positive correlation in a scatterplot 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 scatterplot indicate?

Back

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

Front

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

Back

The equation of a line in slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

What does the y-intercept represent in a linear equation?

Back

The y-intercept represents the value of y when x is 0, indicating where the line crosses the y-axis.

Front

How can you predict values using a line of best fit?

Back

You can predict values by substituting x-values into the equation of the line of best fit to find corresponding y-values.

Front

What is a weak correlation in a scatterplot?

Back

A weak correlation means that the data points are spread out and do not follow a clear trend.

Front

What is a strong correlation in a scatterplot?

Back

A strong correlation means that the data points are closely clustered around the line of best fit, indicating a clear relationship.