Is the line through points P(–7, 2) and Q(7, –6) parallel to the line through points R(–1, –5) and S(–3, –1)? Explain.
A) No; one line has zero slope, the other has no slope.
B) Yes; the lines are both vertical.
C) Yes; the lines have equal slopes.
D)No; the lines have unequal slopes.

Question

Is the line through points P(–7, 2) and Q(7, –6) parallel to the line through points R(–1, –5) and S(–3, –1)? Explain.  
A) No; one line has zero slope, the other has no slope.
B) Yes; the lines are both vertical.
C) Yes; the lines have equal slopes.
D)No; the lines have unequal slopes.

aroub · Answer

The only way to find out is to find the slope.

aroub · Answer

P(–7, 2) and Q(7, –6) 

=> -6-2/7+7
       -8/14

PQ=- 4/7

R(–1, –5) and S(–3, –1) 

=> -1+5/-3+1
       4/-2
       -2

RS=-2 

D) No; the lines have unequal slopes

aroub · Answer

Parallel= same slope but here they do not have equal slopes so they're not parallel.