Question

What is this called, like whats the name of this thing??
{18 ≤ y ≤ 30}

Answer 1

An inequality.

Explanation:

This gives the range of values that y can take.

It can equal 18 or be greater than eighteen but it also could be 30 or less than thirty.

WE read the signs starting from y to the left and to the right.

So y is greater or equal to 18 and less than or equal to 30.