Which of the following is an example of direct variation?

Mathematics

1 answer:

LekaFEV [45]3 years ago

6 0

Answer:

Step-by-step explanation:

Direct variation is a special case of first order equations; in both cases, the input is multiplied by a constant which we call the "slope" or "constant of variation." However, no direct variation equation includes a constant ("y-intercept"). So, if a given equation does have a y-intersect, that equation does not represent direct variation; if it does NOT have a y-intercept, that equation represents direct variation.

A) involves a constant term, -2; NOT direct variation

B) involves a constant term, 10; NOT direct variation

C) Here 3y = x, or y = x/3, involves no constant term, so Does represent direct variation

D) involves a constant term -3; NOT direct variation

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Alexxandr [17]

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2 years ago

A graphic designer is drawing a pattern of four concentric circles on the coordinate plane. the center of the circles is located

Luden [163]

Hi!

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If the smallest circle has a radius of 3 units, then the next one is 7 units (4 units greater), and then the second largest 11 units, and then the largest 15. That means, for r in our equation, we're going to put in 15.

So we get:

(x – h)² + (y – k)² = 15², or

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3 years ago

Five more than the quotient of a number and 3 equals 2.

MakcuM [25]

Answer: