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trapecia [35]
3 years ago
13

If the point (4,-2) is included in a direct variation relationship, which point also belongs in this direct variation? A. (-4,2)

B. (-4,-2) C. (2,-4) D. (-2,4)
Mathematics
1 answer:
IceJOKER [234]3 years ago
5 0

Answer:

(-4,2) belongs in this direct variation.

Step-by-step explanation:

Let the direct variation relationship is expressed by the equation y = mx ........ (1), where x and y are in direct variation and k is the variation constant.

Now, the point (4,-2) is included in the direct variation relationship, then from equation (1) we get, -2 = 4m

⇒ m =  - \frac{1}{2}

Therefore, the equation (1) becomes y = - \frac{1}{2}x

⇒ x + 2y = 0 ......... (2)

Now, from the given four options only the point (-4,2) satisfies the relation (2).

Hence, (-4,2) belongs in this direct variation. (Answer)

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