Step 1: Consider the provided complex expression,

-5i

The graph of the complex number is shown below,

Step 2: The absolute value of the expression is calculated below,

\(\displaystyle{\left|-{5}{i}\right|}=\sqrt{{{\left(-{5}\right)}^{{{2}}}}}\)

\(\displaystyle=\sqrt{{{25}}}\)

\(\displaystyle=\pm{5}\)

Therefore, the absolute value of the function is \(\displaystyle\pm{5}\).