parallel perpendicular lines

Front

What is the definition of parallel lines?

Back

Parallel lines are lines in a plane that never meet. They have the same slope.

Front

What is the definition of perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees). The slopes of perpendicular lines are negative reciprocals of each other.

Front

If two lines are parallel, what can you say about their slopes?

Back

If two lines are parallel, their slopes are equal.

Front

What does 'm' represent in the equation y = mx + b?

Back

'm' represents the slope of the line.

Front

What does 'b' represent in the equation y = mx + b?

Back

'b' represents the y-intercept of the line.

Front

Write an equation for the line parallel to y = 2x + 3 that passes through (1, 4).

Back

y = 2x + 2.

Front

What is the slope of a line that is parallel to a line with slope 5?

Back

The slope is also 5.

Front

What is the slope of a line that is perpendicular to a line with slope -3?

Back

The slope is 1/3.

Front

If a line has a slope of 0, what type of line is it?

Back

It is a horizontal line.

Front

If a line has an undefined slope, what type of line is it?

Back

It is a vertical line.