Scatter Plots and Trend Lines

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 is a trend line?

Back

A trend line is a straight line that best represents the data on a scatter plot, indicating the general direction of the data points.

Front

What is another term for trend line?

Back

Line of Best Fit.

Front

What does the slope of a trend line represent?

Back

The slope of a trend line represents the rate of change between the two variables.

Front

How do you find the slope of a trend line?

Back

The slope is calculated by taking the rise (change in y) over the run (change in x) between two points on the line.

Front

What is the y-intercept of a trend line?

Back

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

Front

Write the equation of a trend line in slope-intercept form.

Back

Front

How do you determine the y-intercept from a graph?

Back

Look for the point where the trend line crosses the y-axis.

Front

What is the significance of a positive slope in a trend line?

Back

A positive slope indicates a direct relationship between the two variables, meaning as one variable increases, the other also increases.

Front

What does a negative slope indicate in a trend line?

Back

A negative slope indicates an inverse relationship between the two variables, meaning as one variable increases, the other decreases.