SOLUTION: Determine which two equations represent parallel lines (a) y=-4x+1 (b) y= 4x+1 (c) y= 1/4x+1 (d) y=-4x+5 (A) (a) and (b) (B) (b) and (c) (C) (a) and (c) (D) (a) and (d)

Question 107916: Determine which two equations represent parallel lines
(a) y=-4x+1
(b) y= 4x+1
(c) y= 1/4x+1
(d) y=-4x+5
(A) (a) and (b)
(B) (b) and (c)
(C) (a) and (c)
(D) (a) and (d)
Found 2 solutions by jim_thompson5910, needhelp?22:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Remember parallel lines have equal slopes. So this means the equations a) and d) have equal slopes of -4. So these two lines are parallel

So the answer is D)

Notice if we graph and , we get

and we can see that the two lines are parallel. So our answer is verified
Answer by needhelp?22(3) (Show Source): You can put this solution on YOUR website!
d because they have the same slope
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