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An irrational number is one that can’t be expressed as a simple fraction.

For instance, the first few digits of the square root of two is written as 1.414213562373095... The digits keep going and cannot be expressed as a fraction. But think of 0.33333... That can easily be written as one-third. The distinguishing feature is that there’s no pattern in the digits for the square root of two.

The first two options are integer fractions. We rule those out immediately. The square root of four is tempting, but realize that it is just equal to two. We come to π (pi).

Arguably the most famous irrational number is π, which starts off as 3.14159265358979... Here, there is again no pattern and the digits extend forever. This meets our definition of our irrational.

The rational numbers are -15/4, -7/9, and √4, the irrational number is π.

What is an irrational number?

It is defined as the numbers in all real numbers which cannot be represented as rational numbers, in other words, the irrational number cannot be expressed in the form of p/q form.

A rational number is a sort of real number that has the form p/q and does not equal zero.

It is given that:

It is given that the numbers are:

-15/4

-7/9

√4

π

As we know, the number is a mathematical entity that can be used to count, measure, or name things. For example, 1, 2, 56, etc. are the numbers.

The rational number can be written in the form of p/q

Where q cannot be zero.

-15/4 - It is a rational number.

-7/9 - It is a rational number.

√4 = 2 - It is a rational number.

π - Pi is an irrational number.

Thus, the rational numbers are -15/4, -7/9, and √4, the irrational number is π.

Learn more about the irrational number here:

brainly.com/question/17450097

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