lvasquev462
given y varies directly as x, and y=9 when x=3. Find y when x=11



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brookester6
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it would be 17

tcarroll010
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y = ax 9 = a3 so a = 3
y = 3x y = (3)(11)

tcarroll010
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So, y would equal 33.

brookester6
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no.... it wouldn't

tcarroll010
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Good luck to you in all of your studies and thx for the recognition! @lvasquev462

brookester6
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O.o

lvasquev462
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i have one more of these questions

brookester6
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sure :P

tcarroll010
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go right ahead, np.

lvasquev462
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given y varies directly as x and y=4 when x=20. Find x when y=6

tcarroll010
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y = ax 4 = a(20) a = (1/5)
y = (1/5)x x = 5y x = (5)(6) = 30

brookester6
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y=ax y=(20)(6)

brookester6
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it'S 20 AND 6! URG

tcarroll010
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So, all I did was basically the same thing, but the only twist here is that I flipped the "x" and "y". See that?

lvasquev462
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yeah i seen tht

tcarroll010
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So, with these "varying directly" problems, you can start out the same way in both cases. Nice working with you!