The same thing to the other side
Answer:
For the first table: (0, 10) (1, 15) (2, 20) (3, 25) (4, 30)
For the second table: (-2, 1.04) (-1, 1.2) (0, 2) (1, 6) (2, 26)
For the third table: (-2, 10) (-1, 0) (-1/2, -5/4) (1, 10)
Step-by-step explanation:

Negative multiply negative = Positive
Negative multiply positive = negative

Thus the answer is -4a + 16b - 12c - 12d.
There is a 25% decrease because the decrease is 30, which is 25% of 120.