Answer:
It's not correct
Because
Ratio is the comparison of two quantities having same units
So this ratio can't be taken
3. 572/1000 4. 9 23/1000 5. 45/100000 6. 9 875/1000
The equation can be rewritten as x = -2/3 y, so x/y = -2/3
However, for y=0, the ratio is undefined as you would be dividing by 0??