Write a function rule to describe the amount of change c(x) from a $20 bill if you buy x pounds of grapes at $1.29 per pound.
Please explain how you did it as well and not just the answer because I dont get it.
Write a function rule to describe the amount of change c(x) from a $20 bill if you buy x pounds of grapes at $1.29 per pound.
Please explain how you did it as well and not just the answer because I dont get it.