Flashcard 5 (parallel,perpendicular,correlation,direct variation)

Front

What is direct variation?

Back

Direct variation is a relationship between two variables where one variable is a constant multiple of the other. It can be expressed in the form y = kx, where k is a non-zero constant.

Front

Does the equation y = 2x represent direct variation?

Back

Yes, it represents direct variation because it can be expressed in the form y = kx with k = 2.

Front

What is the slope-intercept form of a line?

Back

The slope-intercept form of a line is given by the equation y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you find the slope of a line perpendicular to another line?

Back

The slope of a line perpendicular to another line is the negative reciprocal of the slope of the original line.

Front

What is the slope of the line y = -3x - 2?

Back

The slope of the line is -3.

Front

What is the slope of a line perpendicular to y = -3x - 2?

Back

The slope of a line perpendicular to it is 1/3.

Front

What is correlation?

Back

Correlation is a statistical measure that describes the extent to which two variables change together. It does not imply causation.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation indicates that one variable directly affects the other.

Front

What type of correlation is represented when both variables increase together?

Back

Positive correlation.

Front

What type of correlation is represented when one variable increases while the other decreases?

Back

Negative correlation.