f(x)=9x+7
The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.
help why is the answer negative infinity, infinity?
thank you so much...please explain in plain terms (aka baby words...lol) thanks
No problem! I'll explain it in simpler terms for you.
The domain of a function is all the possible values that we can plug into the function to get a valid output. In this case, the function is f(x) = 9x + 7.
For this specific function, there are no restrictions or limitations on what values we can use for x. We can plug in any real number we want, and we will always get a valid output. So, the domain is "all real numbers."
When we say "negative infinity to positive infinity," it means that the function is valid for any real number, no matter how small or large it is. So, any number you can think of can be plugged into the function, and you will still get a valid output.
In summary, the domain of the function f(x) = 9x + 7 is all real numbers because there are no restrictions on what values we can use for x.
the description of the domain is all real numbers.
The interval where f(x) is defined is (-∞,∞) -- that is, all real numbers.