Question

8. Select the option below that best defines perpendicular lines. Explain why every other option is

wrong.
a.
b.
C.
d.
Two lines with the same slope that intersect to make right angles.
Two lines with different slopes that intersect to make right angles.
Two lines with slopes that are negative reciprocals that intersect to make a right angles.
Two lines with different y-intercepts.

Answer 1

C

Explanation:

a. Two lines with the same slope that intersect to make right angles.

False, perpendicular lines do not have same slope.

b. Two lines with different slopes that intersect to make right angles.

While not false there is a more definitive answer.

c. Two lines with slopes that are negative reciprocals that intersect to make a right angles.

Correct answer.

d. Two lines with different y-intercepts.

Only when a line must pass through a specific point is when you need to be worried about y-intercepts.