Answer:
y = 0.9x
Step-by-step explanation:
A movie theater sends out a coupon for 10% off the price of a ticket, so the price of the ticket with the coupon is 100% - 10% = 90% of the original price.
Let
x = original price
y = price of the ticket with the coupon
Then
x - 100%
y - 90%
Write a proportion:
Cross multiply:
Since the original price and final price are always greater than 0, then the graph of this equation is in the first quadrant (see attached diagram)
