Question

Line a y=1/2x+2

line b y= -1/2 x +7
line c y=2x +4
line d y= 1/2x +5/4

which lines are perpendicular​

Answer 1

Line b and line c are perpendicular.

Explanation:

Perpendicular lines have opposite reciprocal slopes, and -1/2 and 2 are opposite reciprocals.