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The graph below models the value of a $20,000 car, t years after it was purchased.
Which statement best describes why the value of the car is a function of the number of years since it was purchased?
Each car value, y, is associated with exactly one time, t.
Each time, t, is associated with exactly one car value, y.
The rate at which the car decreases in value is not constant.
There is no time, t, at which the value of the car is 0.

The graph below models the value of a 20000 car t years after it was purchased Which statement best describes why the value of the car is a function of the numb class=

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coolstick

Answer:

"Each time, t, is associated with exactly one car value, y."

Step-by-step explanation:

First, we can define a function as a relationship where each x value (the horizontal axis/input) corresponds to only one y value (the vertical axis/output). Here, we have time (t) on the horizontal axis and dollars (y) on the vertical axis. Moreover, the output in the question is the value of the car and the input is time (output is a function of input). Therefore, our definition for a function, with these parameters, can be "Each time corresponds to only one car value". This matches up with the second response, "Each time, t, is associated with exactly one car value, y."

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