Answer:
9%
Step-by-step :
9.18 divided by 102 which is the total for everything he bought is .09 which is 9%
Y=mx+b
Remember the m value is always your slope so in this case your slope would be -3
The first step is to define the system of equations.
Take x and y as the cost of a small box and a large box respectively.

Solve the system.



A small box costs $4 and a large box costs $4 too.
There are about 1609.34 meters in a mile