Question

What are examples of direct variation?

Answer 1

Given that x and y vary directly, write the equation relating x and y if x = 3 when y = 24.

First, write the general form for direct variation.

y = kx

Now plug in the x- and y-values to find k.

24 = k(3)

Solve for k.

k = 8

That means our equation is:

y = 8x

Answer 2

DIRECT VARIATION ----------------------------»

Two quantities are said to be indirect variation if one of the quantity increases its value the other does the same (increases).

EXAMPLE ------------› The cost of 2 apples is rupees it accordingly.

COST OF 8 APPLES ALSO INCREASES ,

=> 8/2 × 9 = 36

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There, the number of apples 2 increases from rs. 8 to rs. 36

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