Which equality represents a proportional relationship?

A) - 2.8/-2 = 4.2/3

B) 2.6/1.3 = 4.2/2

C) 2/5 = 8/9

D) 3/4 = 7/12

How to solve-3r+9=-4r+5

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Cody was 165/,/text{cm}165cm165, space, c, m tall on the first day of school this year, which was 10/%10%10, percent taller than he was on the first day of school last year. How tall was Cody on the first day of school last year?

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Solve the proportion 7/5=10.5/b