SAT Math Practice Question #2155 (Medium) | Test Citadel
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SAT Math Difficulty: Medium

Digital SAT Math Practice Question #2155

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An electrician charges an initial inspection fee of $80 plus $55 for each hour of work. Which function $C(t)$ models the total cost, in dollars, for $t$ hours of work?
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Translate English directly to algebra: 'per' means multiply by variable, 'initial/flat' means add constant.

Masterclass Solution & Distractor Trap Analysis

Initial fixed fee is the $y$-intercept ($80$) and hourly rate is the slope ($55$), giving $C(t) = 55t + 80$....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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