Which of the following best describes perpendicular lines

a. lines that are coplanar and do not intersect
b. lines that meet at a 90 angle
c. lines that meet at a 45 angle
d. lines that are not in the same plane

B.

Step-by-step explanation:

Perpendicular lines always intercept at a right angle (90 degrees).

b. lines that meet at a 90 angle

Step-by-step explanation:

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

So, the correct answer is b. lines that meet at a 90 angle.

If you want to know if two equations are perpendicular, take their slopes. The slopes of perpendicular lines are opposite reciprocals of each other.

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).