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Aleksandr-060686 [28]
3 years ago
8

State whether the relationship between the variables in the table is a direct variation, an inverse variation, or neither. If it

is a direct or inverse variation, write a function to model it.
x=3,9,13,20
y=9,27,39,60

I know it's direct but how do I write a function model to it?,
Mathematics
1 answer:
iren2701 [21]3 years ago
5 0
When y increases, x increases ⇒ Direct 

y = kx
when y = 9, x =3
9 = k(3)
9 = 3k
k = 3

therefore y = 3x
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Answer:

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(2 x)/5 - 20/5 = (2 x - 20)/5:

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(5 x)/5 = 60/5

5/5 = 1:

x = 60/5

The gcd of 60 and 5 is 5, so 60/5 = (5×12)/(5×1) = 5/5×12 = 12:

Answer:  x = 12

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