How do i graph the nonlinear relation with the domain and range?

also what does ϵ mean and ℜ? also is there a online calculator i can use for this my teacher said we can use one to graph.

Domain: x ϵ ℜ

Range: y >= -2, y ϵ ℜ

Surely your teacher explained the meaning of those symbols...

ℜ is the set of real numbers
x ϵ ℜ means - x is an element of ℜ. That is, x is a real number.