The answer to this question is 4 groups.
-16.8 = m(4)
-16.8 / 4 = -4.2
So the constant rate is -4.2.
Hope this Helps!!
Answer:

Step-by-step
explanation
explanation is attached to the picture
hope this helps
brainliest appreciated
good luck! have a nice day!
Yh can we please stop with all these links they don’t help at all