If f(x)=y ,then x is called …………….of y.
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Answer:
Step-by-step explanation:
I find it helps sometimes to think of a function as a machine, one where you give a number as input to the machine and receive a number as the output. The name of the function is f, the input is x and the output is f(x), read "f of x". The output f(x) is sometimes given an additional name y by y=f(x).
The example that comes to mind is the square root function on your calculator. The name of the function is √ and we usually write the function as f(x)=x√. On my calculator I input x for example by pressing 2 then 5. Then I invoke the function by pressing the √ button I and receive 5 on the calculator display. Thus 25−−√=5.
Let me look at another example, y=f(x)=x2−4. In this example I am describing the function f by the way it operates. By f(x)=x2−4 I am telling you that if you input a number x to this function then the function squares x, subtracts 4 and returns the result. Thus for example if x=3 then y=f(3)=32−4=9−4=5.
Answer
Step-by-step explanation:
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