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icang [17]
3 years ago
13

The values of x and y vary directly

Mathematics
2 answers:
inna [77]3 years ago
7 0

Answer:

The general formula is x=4y

Step-by-step explanation:

x varies directly as y

x∝y

Then, let k be constant of proportionality

x=ky

If x=12 and y=3

Then, 12=3k

Divide both side by 3

k=4

The general formula

x=ky

Then, since K=4

x=4y

ss7ja [257]3 years ago
6 0

Answer:

y = (1/4)x

Step-by-step explanation:

"Direct variation" here signifies y = kx, where k is the constant of proportionality.

Then y = kx.  Here we are to find k using the info that x = 12 and y = 3:

3 = k(12), or

k = 3/12, or k = 1/4

Then y = (1/4)x

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