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

Answer:

b and c

Step-by-step explanation:

Have a look at lines b and c.  Note that the two slopes (-1/2 and +2) are negative reciprocals of one another.  This is a sure sign that lines b and c are perpendicular.