Question

Help find domain and rage. I got domain=(infinity,infinity) Range=[-2,infinity)

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Answer 1

The function "starts" at (0, -2). So your domain should start at 0, inclusive and increase since the curve goes to the right

Answer 2

In y-values are increasing to -2, so -2 is actually the highest number in the interval for the range

Answer 3

Thanks. so domain is (0,infinity) and range=(0,-2) ?

Answer 4

[0, inf) for domain
(-inf, -2] for range

Answer 5

square brackets because the point is closed

Answer 6

Thank you. Do you know how to find f(4)=

Answer 7

find the y-value on the curve when x = 4

Answer 8

I _think_ you are supposed to read it from the graph... never mind. @peachpi was already in there!

Answer 9

You've been a big help. I just don't see how you got the range. I keep getting [-2,infinity) because i start at the y axis an hit -2 first

Answer 10

yeah, but you're starting at -2 and decreasing. If you keep extending that curve it goes toward -inf.

One that goes toward +inf would be

Answer 11

^that one has the same domain as yours, but the range is [-2, inf)

Answer 12

Would [-2,-infinity) also work for range?