Question

What is the range of y= x + 2?

Answer 1

A) all real numbers greater than or equal to 2

Domain:
`x\geq 0`

Explanation:

The variable in the radical x cannot be less than 0 as that wouldn’t be defined. So, the maximum that x can be is 0, and
`y=x+2`. So, 0+2=2, and y is greater than or equal to 2.

Domain is x is greater than or equal to 0 because you cannot square a negative. So, it must not be less than 0. It could be 0 because square root of 0 is just 0.