m4r11
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The following table shows a proportional relationship between x and y.
x y
2 9
5 22.5
8 36
Write an equation to describe the relationship between x and y.

Respuesta :

Answer:

Assume x is directly proportional to y :

[tex]y \: \alpha \: x \\ y = kx[/tex]

when y is 9, x is 2:

substitute to find value of k :

[tex]9 = (k \times 2) \\ k = \frac{9}{2} [/tex]

Therefore, equation is:

[tex]{ \boxed{ \boxed{2y = 9 x}}}[/tex]

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