曼哈顿国际英语

Mathematics

SAT2019.4.15.png

The graph at left models the monthly bill, m, in dollars, that a particular video hosting company charges a customer who uses t terabytes of bandwidth. What is the best interpretation of the average rate of change between 10 and 35 terabytes in this context?

A:The average amount the company charges each month is about $91 per terabyte up to the tenth terabyte.
B:The average amount the company charges each month is about $110 per terabyte up to the tenth terabyte.
C:The average amount the company charges each month is about $91 per terabyte after the tenth terabyte but before the thirty-fifth.
D:The average amount the company charges each month is about $110 per terabyte after the tenth terabyte but before the thirty-fifth.

解析：

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