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2 years ago

Suppose y varies directly with x. Write a direct variation equation that relates x and y. Then find the value of y when x=16...

Mathematics

2 answers:

olchik [2.2K]2 years ago

6 0

Step-by-step explanation:

y = kx, where k is a real constant.

When x = 2, y = 7.

=> (7) = k(2), 2k = 7, k = 3.5.

Therefore when x = 16,

y = (3.5)(16) = 56.

The value of y is 56 when x is 16.

bija089 [108]2 years ago

5 0

The formula for direct variation is y = kx

Using the known x and y solve for k:

7 = k2

Divide both sides by 2:

k =7/2 = 3.5

Now solve for y when x = 16:

y = 3.5(16)

y = 56

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