Answer:
I guess this is the answer
Step-by-step explanation:
1. the table on the left is a function, with the formula : y = x²
2. the table on the right is also a function, indicated by the values of the input are different each others
6x+3y=-9
3y = -6x - 9
y = -2x - 3 ; This line has slope = -2
Parallel lines, slope is the same so the slope of a line that is parallel to
6x+3y = - 9 is also -2
Answer
-2