Unit 2 Review Part 2

Front

What is the equation of the line of best fit?

Back

The equation of the line of best fit is a linear equation that models the relationship between two variables, typically in the form y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you calculate expected outcomes using a line of best fit?

Back

To calculate expected outcomes, substitute the value of x (independent variable) into the equation of the line of best fit and solve for y (dependent variable).

Front

What does a positive linear correlation indicate?

Back

A positive linear correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative linear correlation indicate?

Back

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

Front

What does 'no association' mean in data analysis?

Back

'No association' means that there is no discernible relationship between the two variables being analyzed.

Front

What is the significance of the slope in a linear equation?

Back

The slope represents the rate of change of the dependent variable with respect to the independent variable.

Front

How do you interpret the y-intercept in a linear equation?

Back

The y-intercept is the value of y when x is zero; it represents the starting point of the line on the y-axis.

Front

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

Back

The slope (m) is calculated using the formula m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are two points on the line.

Front

What does the term 'line of best fit' refer to?

Back

The line of best fit is a straight line that best represents the data on a scatter plot, minimizing the distance between the line and all data points.

Front

How can you determine the type of correlation from a scatter plot?

Back

You can determine the type of correlation by observing the direction of the points: if they trend upwards, it's positive; if downwards, it's negative; if scattered, it may indicate no correlation.