A video game system costs $100, and each game costs $25. Which equation gives total cost y, where x is the number of games?
Ay = 100x + 25
By = 25x + 100
Cy = 100x
Dy = 25 + 100x
Answer & Solution
Correct answer: B. y = 25x + 100
Fixed cost (system): $100. Variable cost (per game): $25 × x. So y = 25x + 100. The slope 25 represents cost per game; the y-intercept 100 represents the upfront system cost.
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