Linear Regressions

Front

What is the formula for linear regression?

Back

y = mx + b

Front

What does the slope mean in the context of linear regression?

Back

For every year passed, your typing speed decreases by 1.4 words per minute.

Front

What type of correlation does a graph show if there is no relationship?

Back

None

Front

What letter do we use to represent the correlation coefficient?

Back

r

Front

What does a positive correlation indicate?

Back

As one variable increases, the other variable also increases.

Front

What does a negative correlation indicate?

Back

As one variable increases, the other variable decreases.

Front

What is the purpose of a line of best fit?

Back

To summarize the relationship between two variables in a scatter plot.

Front

What is the meaning of the y-intercept in a linear regression equation?

Back

The value of y when x is 0.

Front

How do you interpret the correlation coefficient (r)?

Back

It measures the strength and direction of a linear relationship between two variables.

Front

What does a correlation coefficient of 0 indicate?

Back

No correlation between the variables.