Question

What’s the domain value for f(x)=2x+3?

Answer 1

Answer:

All real numbers.

Step-by-step explanation:

Domain is the set of x-values that can be inputted into function f(x).

We see that we can input any value x into the function:

(-∞, ∞) or all real numbers

Answer 2

Answer:

graph{2x+3 [-10, 10, -5, 5]

D:{x∈R}

R:{y∈R}

Step-by-step explanation:

This is just a linear function. I know this because the degree of the x-variable is 1.

Domain and range are sets of possible values the function can have - though not necessarily at the same time.

Thus, there are no restrictions to the domain and range unless context is given.

Therefore, the domain and range is:

D:{x∈R}

R:{y∈R}

If we were to graph this function, we would get a straight line.

graph{2x+3 [-10, 10, -5, 5]}

As you can see, there is no restriction to the possible values.

Hope this helps :)