## Nerdgirl one year ago Please help math problem two questions!!! Will fan and medal for quickest and correct answer! :) Is the relationship between the variables in the table a direct variation, an inverse variation, or neither? If it is a direct or inverse variation, write a function to model it. x 2 5 20 40 y 40 20 5 2 A. neither B. inverse variation; y = 20/x C. direct variation; y = 20x D. direct variation; y = x+15

1. Nerdgirl

@Bigjuicydaddy @kyrabaaker @LeAnn01Xxx @H3LPN33DED @JulZak @Nnesha @donnie1999

2. Nerdgirl

for which one?

3. Nerdgirl

*sigh* Okay. I need help with the first one too though.

4. Nerdgirl

@mathmath333 @mathmate @Red_hikari

5. Nerdgirl

ANYONE!!!!!!!!!!!!!!!!!!!

6. Nerdgirl

@misty1212

7. Nerdgirl

@ganeshie8 @misty1212 @Nnesha

8. anonymous

hold on

9. Nerdgirl

@misty1212 and ok

10. misty1212

HI!!

11. Nerdgirl

hi can someone help me?

12. misty1212

which one are you doing?

13. Nerdgirl

both. preferably the first one first then the second one @misty1212

14. misty1212

as x gets bigger, then y gets smaller right?

15. Nerdgirl

yep

16. misty1212

lets check if it is $y=20x$ is $20=10\times 5$?

17. Nerdgirl

er....... sorry my brain is kind of fried normally i'd be able to do this quickly

18. misty1212

take your time,$$10\times 5$$ is not that hard to do

19. Nerdgirl

oh! right! sorry. hehe. dumb moment. 50

20. misty1212

ok so we can forget that one

21. misty1212

$y=x+15$ is not direct variation so we can forget that one too

22. Nerdgirl

so it's either a or b?

23. misty1212

and $y=\frac{20}{x}$means if you divide $$20$$ by $$x$$ you should get $$y$$

24. misty1212

if $$x=20$$ then $$y=5$$ from the table is $5=\frac{20}{20}$?

25. Nerdgirl

20/20 is 1 so would it be b?

26. misty1212

?

27. misty1212

no not B since as you said $$\frac{20}{20}=1$$ not $$5$$

28. Nerdgirl

oh right! sorry. ugh....... I hate math. thanks again.

29. misty1212

yw

30. Nerdgirl

can you help me with the second one too if i'm not too much of a pain?

31. misty1212

gotta do it quick $y=\frac{k}{x}$ or $xy=k$ you have $$y=30,x=44$$ so $k=30\times 44=1320$

32. misty1212

put $$x=55$$ and compute $y=\frac{1320}{55}$ to get your answer good luckn !

33. Nerdgirl

ty!