Nine times the input minus seven is equal to the output.Which of the following equations describe this function?
1 answer:
Consider the function y = f (x), the element 'x' is the input of the function, and 'y' is the value of the function or the output.
Now, we have to determine the equation for " Nine times the input minus seven is equal to the output"
Since, the input of the function refers to the variable 'x' and output of the function refers to the variable 'y'.
The required equation is:
So,
Therefore, 9x-7=y is the required equation.
Therefore, Option C is the correct answer.
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Answer:
I tried to answer but I still would like to know what doesn't make sense.
Considering the identity:
The identity is true whenever both sides are defined. It is not supposed to hold the values when we have division by zero, because it is undefined.
If the value doesn't make sense, it is probably not a function, or it is undefined by the given value of .
Let's go back to the definition of function again:
A function relates a set of inputs and a set of allowable outputs where each input is related to only one output. It basically defines the relation of ordered pairs.
Hope it helped you a bit.