hardwick744
02.12.2020 •
Mathematics
A server earns t dollars in tips when she serves c customers. Which statement describes the relationship between t and c?
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Ответ:
42
Step-by-step explanation:
SST = ∑ ( y − ȳ ) ² (ȳ = pronounced y bar is the mean of y values)
ȳ = (5+8+14)/3 = 27/3 = 9
∑ ( y − ȳ ) ² = ( 5 − 9 ) ² + ( 8 − 9 ) ² + ( 14 − 9 ) ²
= ( − 4 ) ² + ( - 1 ) ² + ( 5 ) ²
= 16 + 1 + 25
= 42