FLASHCARD Topic 10 Scatter Plots and Trend Lines

Front

What type of correlation does a scatter plot with points that trend upwards have?

Back

Positive correlation

Front

What type of correlation does a scatter plot with points that trend downwards have?

Back

Negative correlation

Front

What does it mean if a scatter plot shows no correlation?

Back

There is no relationship between the variables.

Front

What is a line of best fit?

Back

A line that best represents the data on a scatter plot, used for making predictions.

Front

How can you determine the strength of a correlation in a scatter plot?

Back

By observing how closely the points cluster around the line of best fit.

Front

What does a slope of -5/7 indicate in a real-world context?

Back

For every 7 units of one variable, the other variable decreases by 5 units.

Front

What is the purpose of using a scatter plot?

Back

To visually display the relationship between two quantitative variables.

Front

What does a strong negative correlation look like on a scatter plot?

Back

Points that are closely clustered in a downward trend.

Front

What does a weak positive correlation look like on a scatter plot?

Back

Points that are loosely scattered but trend upwards.

Front

What is the formula for calculating the slope of a line?

Back

Slope (m) = (change in y) / (change in x) or (y2 - y1) / (x2 - x1).