新
If the relationship between the total cost, y, of buying the materials and renting the tools at Store C and the number of days, x, for which the tools are rented is graphed in the xy-plane, what does the slope of the line represent?
A . The total cost of the project
B . The total cost of the materials
C . The total daily cost of the project
D . The total daily rental costs of the tools
正确答案选择D
以下为新SAT OG Test04 数学 Section4 Q17真题，考察大家对于代数和函数相关知识的掌握，这类知识点是每次考察重点，也经常会出难题。考生把这部分知识融汇贯通，明确知识点之间的内在关系，是获得高分的保证。
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