Answer:

Step-by-step explanation:
Given


Required
Find y when 
We have:

Express as equation

Solve for k

When 


When
, we have:



Answer:
2.5
Step-by-step explanation:
7 divided by 28= 0.25 x 10 = 2.5
12= -12
-1/2= 1/2
.25 =-.25
-27=27
0=0
Divide

by 5. Or multiply it by 1/5.
You get - 56/25 or

pounds per month.