The statement "A rational function is a function whose equation contains a rational expression" is indeed true.

### Explanation:
1. **Definition of Rational Function**: A rational function is defined as the ratio of two polynomial functions. This can be expressed in the form:

$$
f(x) = \frac{P(x)}{Q(x)}
$$

where $ P(x) $ and $ Q(x) $ are polynomials, and $ Q(x) \neq 0 $.

2. **Rational Expression**: A rational expression is a fraction where both the numerator and the denominator are polynomials. Therefore, the definition of a rational function aligns perfectly with the characteristics of a rational expression.

Thus, we conclude that the statement is true.

### Final Answer
**A. True**

Question

The statement "A rational function is a function whose equation contains a rational expression" is indeed true.

### Explanation:
1. **Definition of Rational Function**: A rational function is defined as the ratio of two polynomial functions. This can be expressed in the form:

$$
   f(x) = \frac{P(x)}{Q(x)}
   $$

where $ P(x) $ and $ Q(x) $ are polynomials, and $ Q(x) \neq 0 $.

2. **Rational Expression**: A rational expression is a fraction where both the numerator and the denominator are polynomials. Therefore, the definition of a rational function aligns perfectly with the characteristics of a rational expression.

Thus, we conclude that the statement is true.

### Final Answer
**A. True**

Knowee AI · Accepted Answer

The statement "A rational function is a function whose equation contains a rational expression" is indeed true.

### Explanation:
1. **Definition of Rational Function**: A rational function is defined as the ratio of two polynomial functions. This can be expressed in the form:

$$
   f(x) = \frac{P(x)}{Q(x)}
   $$

where $ P(x) $ and $ Q(x) $ are polynomials, and $ Q(x) \neq 0 $.

2. **Rational Expression**: A rational expression is a fraction where both the numerator and the denominator are polynomials. Therefore, the definition of a rational function aligns perfectly with the characteristics of a rational expression.

Thus, we conclude that the statement is true.

### Final Answer
**A. True**

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Question

A rational function is a function whose equation contains a rational expression.

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