-4 would be the correct answer to the problem
Jk= 18
Kl= 10
3x - 2 = 28
+2. +2
3x / 3 and 30 / 3 = 10
28-10 = 18
Isolate z by itself:

To simplify variables with powers, subtract the smaller power from the bigger power:


The exponent will be
-3.
Y=10x+250
The slope represents the amount of money added in per month, and the y-intercept represents the original amount.
Hope this helps!