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kolbaska11 [484]
3 years ago
5

I need help with number 21 please help!!!

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
4 0

Answer:

<h2>This is not a direct variation.</h2>

Step-by-step explanation:

Direct variation:

<em>mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other.</em>

<em>(y varies directly with x with a constant variation of k)</em>

y=kx;\ k\neq0

y=kx\qquad|\text{divide both sides by}\ x\\\\\dfrac{y}{x}=k\Rightarrow \dfrac{y}{x}=constant

21.\\\\x=y+2\qquad|\text{subtract 2 from both sides}\\\\x-2=y\qquad|\text{divide both sides by}\ x\\\\1-\dfrac{2}{x}=\dfrac{y}{x}\ro\dfrac{y}{x}=1-\dfrac{2}{x}\neq constant

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