Digital SAT Math Practice Question #2155
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Translate English directly to algebra: 'per' means multiply by variable, 'initial/flat' means add constant.
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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