Answer:
![y\leq 1](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ojpv86gzduzo3fcd9pxvgjpibr1pgi8d44.png)
Explanation:
The range of a function is all the values that
could take, in this graph the highest value for
is 1, because of this the answer must include all values bellow 1.
Also, the value is marked with a filled point, this means
takes this value, so the answer needs to contain
, putting all together
.