Question

The domain and range of the square root function below is: Domain: half open interval[1, ∞) and Range: half open interval(-∞, -1].

Answer 1

what do you think

Answer 2

false because that doesnt look like the points at all

Answer 3

why not,
domain is all the x coordinates of graph, right ?

Answer 4

but 1, infinite doesnt look right

Answer 5

Look at the graph, the only x coordinates for which the graph exists is after x=1

Answer 6

they cannot give you a graph that shows the sqrt function extending to infinity

Answer 7

it is assumed that the graph continues to the right forever

Answer 8

well if that is the case then true o..o

Answer 9

buht with this one im confused because it looks like it starts at -5 buht it makes you choose 0 as starting point

Answer 10

i know y is infinite

Answer 11

domain : x coordiantes (left and right)
range : y coordinate (up and down)

Answer 12

you need to look vertically at the graph to figure out the range

Answer 13

Notice that the minimum `y` value of the graph is 0

Answer 14

yes ?

Answer 15

So you look at it vertically?

Answer 16

and the graph is rising UP forever
so the range would be [0, infinity)

Answer 17

yes for range you always look at it vertically

Answer 18

because range is all the possible y coordinates

Answer 19

so since 0 ist he starting point it would be [0,infinite)

Answer 20

thats right !