M1 Unit 2 Review (Linear Equations)

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatter plot. It shows the trend of the data points.

Front

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

Back

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

Front

What does a negative slope indicate about a line?

Back

A negative slope indicates that as the x-value increases, the y-value decreases, showing an inverse relationship between the two variables.

Front

What are negative reciprocals in the context of slopes?

Back

Two slopes are negative reciprocals if the product of the slopes is -1. For example, if one slope is 2, the negative reciprocal is -1/2.

Front

What is the correlation coefficient (r)?

Back

The correlation coefficient (r) measures the strength and direction of a linear relationship between two variables, ranging from -1 to 1.

Front

What does r = 1 indicate?

Back

r = 1 indicates a perfect positive linear correlation between two variables.

Front

What does r = -1 indicate?

Back

r = -1 indicates a perfect negative linear correlation between two variables.

Front

What does r ≈ 0 indicate?

Back

r ≈ 0 indicates no linear correlation between the two variables.

Front

What is a positive correlation?

Back

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

Front

What is a negative correlation?

Back

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