Parallel and perpendicular

Front

What are parallel lines?

Back

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

Tags

CCSS.HSG.CO.A.1

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees).

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

Front

What is the slope of a line?

Back

The slope of a line is a measure of its steepness, usually represented as 'm' in the equation of a line.

Tags

CCSS.8.EE.B.5

Front

If two lines are parallel, what can be said about their slopes?

Back

The slopes of parallel lines are the same.

Tags

CCSS.8.EE.B.6

Front

If two lines are perpendicular, what can be said about their slopes?

Back

The slopes of perpendicular lines are opposite reciprocals.

Tags

CCSS.8.EE.B.6

Front

What is the opposite reciprocal of a slope of 3/4?

Back

The opposite reciprocal of 3/4 is -4/3.

Tags

CCSS.8.EE.B.5

Front

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

Back

The slope of a line perpendicular to y = 2x + 3 is -1/2.

Tags

CCSS.8.EE.B.6

Front

How do you find the slope of a line given two points (x1, y1) and (x2, y2)?

Back

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

Tags

CCSS.8.EE.B.5

Front

What is the equation of a line with slope 5 and y-intercept 2?

Back

The equation is y = 5x + 2.

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Front

What is the slope of the line y = -3x + 4?

Back

The slope of the line is -3.

Tags

CCSS.8.EE.B.5