If Y Varies Directly as X, Find a Linear Function $$y = 18 \text { when } x = 21$$

question 192

Multiple Choice

If y varies directly as x, find a linear function which relates them.
- $$y = 18 \text { when } x = 21$$

• A) \(f ( x ) = 3 x\)
• B) \(f ( x ) = \frac { 7 } { 6 } x\)
• C) \(f ( x ) = \frac { 6 } { 7 } x\)
• D) \(f ( x ) = x - 3\)

Understand how variations in variable and fixed costs affect average variable cost, average total cost, and marginal cost.

Analyze the impact of changes in input prices on production costs.

Calculate average total cost for different levels of production output.

Describe the relationship between marginal cost, average total cost, and average variable cost.

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