Scatter Plots

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 relationship in a scatter plot indicate?

Back

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

Front

What is a trend line in a scatter plot?

Back

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

Front

How can you use a trend line to make predictions?

Back

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

Front

What is the line of best fit?

Back

The line of best fit is the line that minimizes the distance between itself and all the data points in a scatter plot.

Front

What does it mean if a scatter plot has no line of best fit?

Back

It means that there is no clear linear relationship between the two variables being plotted.

Front

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

Back

The equation of the line of best fit can be determined using statistical methods such as linear regression.

Front

What is the significance of the slope in the equation of a line?

Back

The slope indicates the rate of change of the dependent variable with respect to the independent variable.

Front

What does a slope of -25 in a line equation indicate?

Back

A slope of -25 indicates that for every unit increase in the independent variable, the dependent variable decreases by 25 units.

Front

What is the purpose of using scatter plots in data analysis?

Back

Scatter plots are used to visually assess the relationship between two variables and identify trends, patterns, or correlations.