Final answer:
The percent equation for an item that is 20% off can be written as: y = 0.8x. This equation represents that the amount you'll pay (y) is 80% (0.8) of the original price (x).
Step-by-step explanation:
The percent equation for an item that is 20% off can be written as:
y = 0.8x
This equation represents that the amount you'll pay (y) is 80% (0.8) of the original price (x).