SAT ACT Prep Determine the slope of a line perpendicular to another line through two points

The video tutorial explains how to find the slope of a line perpendicular to another line. It begins by discussing the properties of perpendicular lines, emphasizing that their slopes are opposite reciprocals. The tutorial then demonstrates how to calculate the slope of a given line using coordinates and the slope formula. Finally, it shows how to find the slope of the perpendicular line by taking the reciprocal and negating the slope of the original line.

What is a key characteristic of the slopes of perpendicular lines?

• They are opposite reciprocals.

• They are both positive.

• They are both negative.

• They are equal.

Which formula is used to calculate the slope of a line?

• m = x2 - x1 / y2 - y1

• m = y2 - y1 / x2 - x1

• m = x1 - x2 / y1 - y2

• m = y1 - y2 / x1 - x2

Given the points (5, 6) and (6, 10), what is the slope of line P?

• 1/4

• 1

• 4

• 2

How do you find the slope of a line that is perpendicular to another line with a slope of 4?

• Subtract 1 from the slope

• Take the reciprocal and negate it

• Multiply the slope by -1

• Add 1 to the slope

What is the slope of line M if it is perpendicular to line P with a slope of 4?

• 1/4

• -1/4

• 4

• -4