Slopes of Parallel Lines

Q.

Find the value of k if PQ and RS are parallel, given P(1, 2), Q(4, 5) and R(3, 4), S(8, k).

1. 9

2. 7

3. -7

4. -9

Q.

If the lines $2y-a^{2}x=3$ and $2y-(4ax+1)=0$ are parallel, find the value of a.

1. 2

2. 4

3. 6

4. 8

Q.

Two non-vertical lines are parallel if and only if their slopes are equal.

1. True
2. False

Q. If the lines $2y-a^{2}x=3$ and $2y-(4ax+1)=0$ are parallel, find the value of a.