Answer:
a) -4
b) 1/4
Step-by-step explanation:
a) -4. This is because parallel lines have the same slope.
b) 1/4. This is because the product of perpendicular slopes will be -1. (This can be seen as -4 * 1/4 = -1)
Hope this helps and be sure to have a wonderful time ahead at Brainly! :D