Write the rational number that does not have a reciprocal.

Write:
The rational numbers that are equal to their reciprocals.

The reciprocal of $–5$ is $k$, then $-5k=$ _____.

Reciprocal of $\frac{1}{x}$, where $x\ne 0$ is _____.

The reciprocal of a positive rational number is _____. (positive/negative)

Write the rational number for each point labelled with letters, on the number line: