SOLUTION: ``Line L, passes through points P(n, 4) and Q(1 2), Line L, passes through points R(4, 3) and S (1, 5). a) What is the value of n if the lines are parallel? b) If the lines are per

Question 1106594: ``Line L, passes through points P(n, 4) and Q(1 2), Line L, passes through points R(4, 3) and S (1, 5). a) What is the value of n if the lines are parallel? b) If the lines are perpendicular, what is the value of n?''.
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Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
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PQ

(a)
Lines to be parallel?
Slopes be equal.

Solve this for n.
-

(b)
Lines to be perpendicular?

Solve this for n.
-
cross-multiply,

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