In Exercises 5-10, find the value of A that would make the statement true.
5. The lines 3x - 4y 6 and Ax+12y = 20 are parallel.
6. The lines 7x + 2y = 8 and Ax + 4y = 11 are parallel.
7. The lines 6x - 8y = 11 and Ax + 2y = 15 are parallel.
8. The lines 5x+10y = 40 and Ax +9y = 27 are perpendicular.
9. The lines 4x - 3y = 10 and 4x + 4y = 7 are perpendicular.
10. The lines 8x + 32y = 14 and 4x + y = 12 are perpendicular.
In Exercises 11 and 12, use the data in the table to answer the question