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函数：建模关系（续）
如何用函数这一数学思想来表示两个变化中的量之间的关系？
1. Determining whether a relationship is a function or not
Determining whether a relationship is a function or not
2. Summary
Summary
3. Any table of pairs defines a function
A table in which the input x = 2 appears twice with different outputs still defines y as a function of x.
4. Which relation is a function
Which of these relations can be viewed as a function of the stated input?
5. Height graph of the conical tank
An inverted cone 2 feet deep with top radius 3 feet fills at 0.75 cubic feet per minute. How does the depth h behave as the cone fills?
6. Number of outputs for one input
In a valid function table the input x = 3 must pair with how many different outputs y?
7. The odometer and the fuel gauge
A driver records fuel G against odometer distance D, and at D = 100 the tank holds 1.5 gallons before refueling and 10.0 gallons after. Can G be a function of D?