# What is the domain of f(x) = 5x – 7?

Domain refers to the x value of the function of the graph, where it is defined.

## Answer: The domain will be all real numbers, as the function is a straight line, with no discontinuities, thus undefined at no value of x.

The domain is generally undefined at those values where the function fails to exist.

**Explanation:**

The domain of any expression refers to all the real numbers, except where the expression is undefined.

In the given expression, that is, f (x) = 5x - 7, we can say:

### So, the domain will be all real numbers, as the function is a straight line, with no discontinuities, thus undefined at no value of x.

Graph for f(x) = 5x - 7

Interval notation for f (x):

(- ∞ , ∞)