Writing Equations of Parallel or Perpendicular Lines

Front

What is the slope of a line that is perpendicular to a line with a slope of 5/8?

Back

-8/5

Tags

CCSS.8.EE.B.6

Front

What do two lines that are perpendicular have in common regarding their slopes?

Back

Their slopes are opposite reciprocals.

Tags

CCSS.8.EE.B.6

Front

What do two lines that are parallel have in common regarding their slopes?

Back

Their slopes are the same.

Tags

CCSS.8.EE.B.6

Front

What is the equation of a vertical line that passes through x = 3?

Back

x = 3

Front

What is the slope of a vertical line?

Back

Undefined.

Tags

CCSS.8.EE.B.5

Front

What is the slope of a horizontal line?

Back

Zero.

Tags

CCSS.8.EE.B.5

Front

If the slope of a line is 2, what is the slope of a line that is perpendicular to it?

Back

-1/2.

Tags

CCSS.8.EE.B.6

Front

If two lines have slopes of 3 and -1/3, what is their relationship?

Back

They are perpendicular.

Tags

CCSS.8.EE.B.6

Front

What is the general form of the equation of a line?

Back

y = mx + b, where m is the slope and b is the y-intercept.

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Front

How do you find the slope between two points (x1, y1) and (x2, y2)?

Back

Slope (m) = (y2 - y1) / (x2 - x1).

Tags

CCSS.8.EE.B.5