Answer:
Explanation:
Janet, Rose, and Tanya buy different number postcards from their favorite souvenir shop
Janet buys 3 postcards for $1.05.
This means Janet bought one postcard at the rate of 1.05/3 = 0.35 per postcard.
Rose buys 5 postcards for $1.75.
This means Rose bought one postcard at the rate of 1.75/5 = $0.35 per postcard.
Tanya buys 8 postcards for $2.80.
This means Tanya bought one postcard at the rate of 1.75/5 = $0.35 per postcard.
The unit rate at which Janet, Rose and Tanya bought = $0.35
This means the cost, y, in dollars and the number of postcards, x is proportional.
The equation representing the relationship is
x = 0.35y