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 correlation in a scatter plot 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 scatter plot indicate?

Back

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

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 a 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 equation of a trend line?

Back

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

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; a steeper slope indicates a stronger relationship.

Front

What is the y-intercept in the context of a trend line?

Back

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

Front

How do you interpret a scatter plot with no correlation?

Back

A scatter plot with no correlation shows no discernible pattern; the data points are scattered randomly.

Front

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

Back

Scatter plots are used to visually assess relationships between variables, identify trends, and detect outliers.