Which expression is equivalent to -7 - 9?

The constant of proportionality is always the where k is the constant of proportionality. additionally, you can find the constant of proportionality by finding the ratio for any point onasap

Pls brainliest will be awarded if answer is correct

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.