Algebra 1 Linear Regression Practice

Front

What does a correlation coefficient of 0.92 indicate about the relationship between two variables?

Back

There is a strong positive correlation between the two variables.

Front

Given the linear regression equation y = 61.93x - 1.79, predict the value of y when x = 10.

Back

617.5 miles.

Front

In the equation y = 40x + 100, what does the y-intercept (100) represent in the context of the problem?

Back

The predicted weight of the rat at birth.

Front

What does the slope of -1.4 in a linear regression context indicate?

Back

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

Front

What does a line of best fit represent in a scatter plot?

Back

The overall trend of the data points.

Front

What is the purpose of linear regression analysis?

Back

To model the relationship between two variables and make predictions.

Front

What does it mean if the slope of a regression line is positive?

Back

As one variable increases, the other variable also increases.

Front

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

Back

It represents the predicted value of y when x is zero.

Front

How can you interpret a negative correlation coefficient?

Back

As one variable increases, the other variable tends to decrease.

Front

What is a scatter plot used for?

Back

To visually represent the relationship between two quantitative variables.