Scatter Plots/Best Fit Lines

Front

What is a scatter plot?

Back

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

Front

What does a positive correlation indicate in a scatter plot?

Back

A positive correlation indicates that as one variable increases, the other variable also increases.

Front

What does a negative correlation indicate in a scatter plot?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What does no correlation mean in a scatter plot?

Back

No correlation means there is no apparent relationship between the two variables.

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, used to make predictions.

Front

How do you find the slope of a line using two points?

Back

The slope is calculated by the formula (y2 - y1) / (x2 - x1) using two points (x1, y1) and (x2, y2).

Front

What is the purpose of using a trend line in a scatter plot?

Back

The purpose of a trend line is to summarize the relationship between the variables and to make predictions.

Front

If a scatter plot shows a downward trend, what type of correlation is present?

Back

A downward trend indicates a negative correlation.

Front

What does it mean if the points on a scatter plot are widely spread out?

Back

Widely spread out points indicate a weak correlation between the variables.

Front

What is the first step in creating a scatter plot?

Back

The first step is to collect and organize the data for the two variables you want to compare.