Question

Find the range of the parent function below.

y= square root of x
A.
all real numbers
B.
all positive numbers
C.
all positive numbers and 0
D.
all negative numbers

Answer 1

the domain of a function are all possible values you can let x be equal to
you know you can not have a square root of a negative number so x must be greater than of equal to 0

the range is all possible values y can be equal to
so if x has to be any number from 0 to positive infinite
then the square root of x gives a plus and a minus answer for any x value

so the range is what y can be
Y can be all real numbers

Answer 2

think back to like elementary school
you know those input output functions
where it was like

__ + 3 = 10

the input is the domain

the output is the range (10)