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15.

Write a direct variation equation if x = 7 and y = 42.

16.

Use the equation in example 15 to find x if y = 66.

User Fischbrot
by
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1 Answer

4 votes

Answer:

15. y = 6x

16. x = 11

Explanation:

15. A direct variation equation is of the form ...

y = kx

Solving for k, we find ...

k = y/x = 42/7 = 6

The equation is y = 6x.

__

16. Filling in the given values, we have ...

66 = 6x

11 = x . . . . . . . divide by 6

User Ento
by
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