## anonymous one year ago help plz

1. anonymous

Below are two different functions, f(x) and g(x). What can be determined about their y-intercepts? f(x) = x + 4 x g(x) −1 8 1 0 2 −4 The function f(x) has a higher y-intercept. The function g(x) has a higher y-intercept. They both have the same y-intercept. The relationship between y-intercepts cannot be determined.

2. Nnesha

g(x) is same as y so first of all find y-intercept of de table

3. Nnesha

y=mx+b is a slope intercept form where m is slope and b is y-intercept f(x)=x+4 <----what is the y-intercept in this equation ?

4. anonymous

4

5. Nnesha

yes right and what's the y-intercept of table ?

6. Nnesha

the*

7. anonymous

there is 0, 8, and -4

8. anonymous

brb please i have to go help my mom out

9. Nnesha

nope 0 ,8 and -4 are y values not y-intercept first of all you have to find slope of the table and then y-intercept

10. Nnesha

alright :-)

11. anonymous

i meant $\frac{ 8 }{ 2 } = \frac{ 4 }{ 1 }\\= 4$

12. Nnesha

formula is $\huge\rm \frac{ y_2 - y_1 }{ x_2 - x_1 }$plug in x and y values u forgot something .-.

13. anonymous

$0 - 8 = -8 and 1 - (-1) = 2$ so we got -4 because $- \frac{ 8 }{ 2 } = -4$

14. Nnesha

yes right

15. anonymous

now what?

16. Nnesha

now y = mx + b replace m by -4 plug in x and y values solve for b

17. anonymous

okay so y = -4x +b 8 = -4(-1) + b 8 = 4 + b -4 - 4 4 = b b = 4

18. Nnesha

yes right that's the y-=intercept of the table

19. anonymous

so its C because they both have the same y-intercept

20. Nnesha

yep right

21. anonymous

can you help me with more because your so good at getting me to understand it and doing it myself :)

22. anonymous

ill post them in a new thread so you can get more medals

23. Nnesha

i'll try and u can post here :-)

24. anonymous

okay

25. anonymous

Alton has been recording the number of apples on his apple tree each week: Week Apples 2 15 3 22 4 29 5 36 The function representing Alton's apples per week is f(w) = 7w + 1. What does the 1 represent? The number of apples at the start The week number when Alton recorded the apples The number of apples Alton had in total The number the apples increased by each week

26. Nnesha

any idea ?

27. anonymous

28. Nnesha

alright

29. anonymous

the y - intercept right because you said b = y-intercept or it means y intercept

30. Nnesha

yep one is the y-intercept so what would be ur answer ?

31. anonymous

the numbers of apples at the start

32. Nnesha

yes right bec when u substitute 0 for w f(0)=7(0) + 1 you will get one so y-intercept is also the starting point

33. anonymous

okay thnx i have a coup[le more

34. Nnesha

okay

35. anonymous

Im gonna try to solve the next one on my own and you tell me if its right or wrong but this is the question

36. anonymous

On the graph of the equation 8x − 3y = 24, what is the value of the y-intercept? −8 8 −3 3

37. anonymous

8x - 3y = 24 -8x - 8x -3y = -8x + 24 /-3 /-3 y = -8x -8 so is the y - intercept -8

38. Nnesha

alright that's right y-intercept is -8 but slope is not -8 divide both side by -3$\frac{ -3y }{ -3} = \frac{ -8x+24 }{ -3 } = \frac{ -8x }{ -3 } +\frac{ 24 }{ -3}$

39. Nnesha

-8x+24 OVER -3

40. anonymous

oh okay so its like this $\frac{ -8x + 24 }{ -3 }$

41. Nnesha

yes right -8x is dividing by -3 and 24/-3

42. anonymous

okay but is the answer -8?

43. anonymous

for the y-intercept?

44. Nnesha

so how would you write equation in slope yintercept form ?

45. anonymous

$y = \frac{ -8 }{ 3 }x - 8$

46. Nnesha

yes right!

47. anonymous

yay

48. anonymous

Based on the table of values below, find the slope between points where x = 3 and where x = 7. x y 3 1 4 6 7 9 −4 $\frac{ 1 }{ 4 }$ 1 2 <--- my choice

49. Nnesha

how did you get -4 and 1/4 ?

50. Nnesha

ohh wait those are the choices alright how did you get 2 ?

51. anonymous

-4 , 1/4, 1, 2 are my answer choices

52. anonymous

so i did $\frac{ 9 - 1}{ 7-3 } = \frac{ 8 }{ 4 }$ = 2

53. Nnesha

yes right

54. anonymous

okay lol good i thought i did it wrong lol

55. anonymous

After 3 months of living at his new house, Tony had 4 birds. Four months later, Tony still had 4 birds. Which of the graphs below models Tony's bird population? graph of line going through 4, 0 and 4, 8 graph of line going through 0, 4 and 7, 4 <- my choice graph of line going through 1, 5 and 4, 8 graph of line going through 4, 0 and 7, 3

56. anonymous

let me know if you want the picture of the graphs

57. Nnesha

i have to go make a new post and yes we need graph

58. anonymous

okay