Watson Bowers
01/30/2024 · Junior High School
5. Janet, Rosi, and Tanya buy postcards from their favorite souvenir shop. anet buys 3 postcards for \( \$ 1.05 \). Rosi buys 5 postcards for \( \$ 1.75 \). Taryy buys 8 postcards for \( \$ 2.80 \). Are the cost, \( y \), in dollars and the number postcards, \( x \) proportional? Explain your answer. Write an equation of represent this relationship, if possible. Lesson \( 2-4 \)
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The cost \( y \) and the number of postcards \( x \) are proportional. The equation representing this relationship is \( y = 0.35x \).
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