You're on a roll — An irrational number is a number that cannot be expressed as a simple fraction $\frac{p}{q}$, where $p$ and $q$ are integers and $q \neq 0$. Their decimal representations are non-terminating and non-repeating. Let's examine each number: 1. -6: This is an integer. It can be written as $\frac{-6}{1}$. Since it can be expressed as a fraction of two integers, it is a rational number. 2. the square root of 4: This is $\sqrt{4}$. $$ \sqrt{4} = 2 $$ This is an integer. It can be written as $\frac{2}{1}$. Since it can be expressed as a fraction of two integers, it is a rational number. 3. negative negative 3 over 4: This can be written as $-\left(-\frac{3}{4}\right)$. $$ -\left(-\frac{3}{4}\right) = \frac{3}{4} $$ This is already in the form of a fraction of two integers. Therefore, it is a rational number. All the numbers provided are rational. The irrational numbers from the list are: $\boxed{\text{None}}$ What's next? Send 'em