## hiralpatel121 2 years ago What is the domain and range in interval notation of problem #2 in the attached document?

1. hiralpatel121

2. ghazi

$(-\infty,\infty)$

3. hiralpatel121

Why?

4. ghazi

because your function is y=3x+7 and this is defined for whole real numbers

5. ghazi

@hiralpatel121 clear??

6. hiralpatel121

Okay. So the the answer is the same for both the domain and the range?

7. hartnn

domain means all the values that t can take so that the function does not become complex,or become undefined if we observe in V(t) = -203t+9655 for any value of t ,V(t) will be defined. so domain=(-infinity,infinity)

8. ghazi

yes

9. hartnn

range mean all the values V(t) can take as its a linear function,it can take infinite values depending on infinite values of t hence range is same.

10. hartnn

still doubts regarding this?

11. hiralpatel121

No, I've got it. I need help with doing parts of number 1 though. I tried to do it but then I got confused.

12. hartnn

find all x where f(x)=304 this??

13. ghazi

3x+7=304 3x=304-7 3x=297 x=99

14. hiralpatel121

That would be the answer for where f(x)=304?

15. ghazi

yes

16. hiralpatel121

What about parts (d) and (e) for number 1? How would I do those?

17. hartnn

for part e, same logic as #2 same domain,range.

18. ghazi

you have set of points like let's say two variables are x and y now you have (-6,-11) , (-2,1) and (0,7) plot this on graph paper

19. ghazi

your graph will tell you the domain and range

20. hiralpatel121

Okay, thank you.

21. ghazi

:) YW