What is the constant of proportionality in the equation y = 7x A.
1

B.
1/7

C.
7

D.
21

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1 1/5

step-by-step explanation:

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)