Question

what is the name of this figure?

Explanation:

A line is a straight path that extends infinitely in both directions. The figure shown has arrows at both ends (indicating infinite extension) and passes through points Z and Y, so it is a line, often named by two points on it with a double - headed arrow notation, like $\overleftrightarrow{ZY}$.

Answer:

$\overleftrightarrow{ZY}$ (or "Line ZY")