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10. Suppose that y varies directly with x. When y is 12, x is -3. What is y when x is 4?

PLEASE HELP

10 Suppose that y varies directly with x When y is 12 x is 3 What is y when x is 4 PLEASE HELP class=

Respuesta :

Answer:

y = -16

Step-by-step explanation:

Given that,

y varies directly with x. Mathematically, we can write it as follows :

[tex]y\propto x[/tex]

or

[tex]y=kx[/tex]

Where

k is constant

Put y = 12 and x = -3 to find k. So,

[tex]k=\dfrac{y}{x}\\\\k=\dfrac{12}{-3}\\\\k=-4[/tex]

Now put k = -4 and x = 4. So,

[tex]y=-4\times 4\\\\=-16[/tex]

So, the required value of y is equal to -16.