Unit 3 Test Review

Front

What is a line of best fit?

Back

A line that best represents the data on a scatter plot, showing the trend of the data points.

Front

What does a strong negative correlation indicate?

Back

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

Front

What is the slope of a line?

Back

The slope indicates the steepness of the line and the direction of the relationship between two variables.

Front

Back

The slope is 2, meaning for every unit increase in x, y increases by 2 units.

Front

Back

Front

What is the difference between causation and correlation?

Back

Causation indicates that one event causes another, while correlation indicates a relationship without implying cause.

Front

How can you identify a strong positive correlation in a scatter plot?

Back

Data points cluster closely around a line that slopes upwards from left to right.

Front

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

Back

Data points are scattered but show a slight downward trend from left to right.

Front

What is the formula for calculating the slope between two points (x1, y1) and (x2, y2)?

Back

The slope (m) is calculated as m = (y2 - y1) / (x2 - x1).

Front

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

Back

It indicates that there is no change in y as x changes; the line is horizontal.