## sbuck98 one year ago Can someone help me get the answer and show how they got it?

1. sbuck98

2. sbuck98

@Nnesha do you know any of this stuff?

3. sbuck98

@paki @Luigi0210 @lynzandriptide @isry98

4. Nnesha

y=mx+b is slope intercept form where m is slope and b is y-intercept

5. sbuck98

How'd you get it though?

6. Nnesha

i didn't get anything it's the original equation for slope intercept form

7. sbuck98

OH sorry! Could you help me solve ABCD for that problem? and explain how you got the answers

8. Nnesha

y=mx+b is slope intercept parallel lines should have the same slope example if the slope of line a is 2 then slope of line b would be 2 as wll slope of perpendicular lines are negative reciprocal if slope of line a is a/b then slope of b would be -b/a

9. sbuck98

okay!

10. Nnesha

so what's the slope of line J ??

11. sbuck98

Y=-4+2x?

12. Nnesha

just slope

13. Nnesha

like i said y=mx+b m is slope which is always with x variable

14. sbuck98

so 2?

15. Nnesha

yes right

16. Nnesha

now we need equation of the line that's parallel to y=2x+4 slope of new line would be what ? parallel lines would have the same slope

17. sbuck98

so it's the same?

18. Nnesha

yes right

19. sbuck98

SO that would be by anwser for A?

20. Nnesha

21. sbuck98

The same because anything that's parallell is the same

22. Nnesha

yes right!

23. sbuck98

OK:)))

24. Nnesha

so part C) find the equation m=2 we already know that so y =mx+b use the order pair they gave u for x and y values and replace m with 2 to find b

25. Nnesha

$\huge\rm y=2x+b$ passes through (3,7) so replace (x,y) with (3,7) and solve for b

26. sbuck98

7+2*3+b?

27. Nnesha

if you mean 7 = 2(3)+b then yes now solve for b

28. sbuck98

1?

29. Nnesha

yes right so b=1 now you can replace b with one in the original equation

30. sbuck98

7=2(3)+1

31. Nnesha

well we need in slope intercept form so keep the x and y variables y=2x+1

32. sbuck98

thank you

33. Nnesha

last part if the we need line that's perpendicular to line j y=2x+4 like i said perpendicular slopes are negative reciprocal so what would be the slope of line h ?

34. Nnesha

i've to go will be back

35. sbuck98

y=-4+2x

36. sbuck98

ok how long?

37. Nnesha

oh well got few mints

38. sbuck98

oh good!

39. Nnesha

alright here is ane example if slope of the first line is a/b then perpendicular slope would be -b/a <--flipped the fraction and changed the sign

40. Nnesha

so what's the perpendicular slope for line h ?

41. sbuck98

42. Nnesha

no

43. sbuck98

-4+2x=y

44. Nnesha

i said slope would negative reciprocal but the slope of the equation u posted is the same like J=2x+4

45. Nnesha

remember : parallel lines same slope  perpendicular slopes negative reciprocal

46. sbuck98

ok

47. Nnesha

what's the slope of line j ?

48. sbuck98

-4+2x=j

49. Nnesha

why are u keep posting that equation ? j=2x + 4

50. sbuck98

ok

51. Nnesha

what's the slope( not the equation) of line J ?

52. sbuck98

2

53. Nnesha

yes right so slope of line h would be negative reciprocal of 2

54. sbuck98

you prob think im stupid but are we on C or D?

55. Nnesha

for which part they are asking perpendicular  equation ? :=)

56. sbuck98

D:)

57. Nnesha

yes so ofc D

58. Nnesha

here is an example if slope of first equation is a/b then slope of perpendicular equation would be -b/a so if the slope of line J is 2 then slope of line h would be what ?

59. sbuck98

-2

60. Nnesha

what's the reciprocal of 2 ? it's same as 2/1

61. sbuck98

1/2

62. sbuck98

or 1

63. Nnesha

no 1/2 is right so it would be -1/2

64. sbuck98

ok

65. Nnesha

now replace m with -1/2 and substitute (x,y) for given order to find b

66. sbuck98

help

67. Nnesha

what's the original equation of slope intercept ?

68. Nnesha

for **

69. sbuck98

j=2x=4

70. sbuck98

+4

71. Nnesha

you really like that equation y=mx+ b is the original equation replace m with -1/2 and then (x,y) with the given point in part D

72. sbuck98

-1/2+8+10

73. Nnesha

hmm y=mx+b y value should at left side

74. Nnesha

just like u did for part C

75. sbuck98

10=-1/2(8)

76. Nnesha

yes right solve for b 10=-1/2(8)+b

77. Nnesha

gtg

78. sbuck98

ok

79. sbuck98

b=21/2=10.500

80. Nnesha

hmm no $10=-\frac{ 1 }{ 2 }(8)+b$ you can divide 8/2

81. Nnesha

it shouldn't be decimal