## xxdgffsdgdfgffgsg 2 years ago Write an equation in slope-intercept form for the line shown. http://roads.advancedacademics.com/contentserver/content/roadssection/277812/questions/4-hw7/slope_intercept_2.gif A. y = 2/3 x + 2 B. y = 3/2 x - 4 C. y = 3x - 4 D. y = 2x - 1

1. AriPotta

find the slope between (0,-4) and (2,-1)

2. AriPotta

3. xxdgffsdgdfgffgsg

ok I got 3/2 now what

4. AriPotta

which choice has 3/2 as the slope?

5. xxdgffsdgdfgffgsg

b

6. AriPotta

7. xxdgffsdgdfgffgsg

can you help me on this question Write an equation in slope-intercept form of the line with the given slope and point: slope = 3 and (1, -2). A. y = 3x - 5 B. y = 3x - 2 C. y = 3x + 1 D. y = 3x + 3

8. AriPotta

put the information in point-slope form, then change it into slope-intercept form

9. xxdgffsdgdfgffgsg

how do i make it into point slope form

10. AriPotta

point-slope form is y - y1 = m(x - x1)

11. xxdgffsdgdfgffgsg

I know that but how to I fill that in to then make it slope intercept form

12. AriPotta

you put the numbers in first, then you can rearrange to make it into slope-intercept

13. xxdgffsdgdfgffgsg

where would I put the numbers

14. AriPotta

they give you the point (1, -2). so -2 would be y1 and 1 would be x1. they also give you the slope, 3. so 3 would be m

15. xxdgffsdgdfgffgsg

would y and x not y1 and x1 but y and x become 0

16. xxdgffsdgdfgffgsg

also would it look like this y--2=3(x-1)

17. AriPotta

yes. y + 2 = 3(x - 1). now distribute the 3 into the parentheses

18. xxdgffsdgdfgffgsg

y+2=(3-1)

19. AriPotta

no, to distribute, you have to multiply 3 with x, and 3 with -1

20. xxdgffsdgdfgffgsg

so y+2=3-3

21. AriPotta

it would be 3x, not just 3 :) y + 2 = 3x - 3. now, what should we do to get it in the form of y = mx + b? it's our last step

22. xxdgffsdgdfgffgsg

subtract 2 from each side

23. xxdgffsdgdfgffgsg

would that be the right step

24. AriPotta

yea

25. xxdgffsdgdfgffgsg

so it's either b or c

26. AriPotta

27. xxdgffsdgdfgffgsg

when i calculate it it comes up with y=3x-1 but that isn't an answer

28. xxdgffsdgdfgffgsg

did i do that wrong

29. AriPotta

what's -3 - 2?

30. xxdgffsdgdfgffgsg

-5

31. xxdgffsdgdfgffgsg

so a

32. AriPotta

yup

33. xxdgffsdgdfgffgsg

thanks if I have any other questions I will send you a message

34. AriPotta

mmk

35. xxdgffsdgdfgffgsg

on this question I came up with c is that right Write the equation y - 2 = 4(x + 5) in standard form. A. 4x + y = 7 B. 4x - y = 3 C. 4x - y = -22

36. AriPotta

yes, it's c :)

37. xxdgffsdgdfgffgsg

k

38. xxdgffsdgdfgffgsg

is this question answer c Write the point-slope form of the equation passing through (5, -1) with a slope of 6. A. y-1=6(x+5) B. y+5=6(x-1) C. y+1=6(x-5) D. y-5=6(x+1)

39. AriPotta

yes, that's also c

40. xxdgffsdgdfgffgsg

is this c to Find the direct variation equation which passes through (0, 0) and (4, 1). A. y = 4x B. y = -4x C. y = 1/4 x D. y = -1/4 x

41. AriPotta

yes. it's c lol.

42. xxdgffsdgdfgffgsg

is this one d Write an equation in slope intercept form of the line that passes through (4, 1) and (5, -1). A. y = -4x + 1 B. y = -1/2 x + 9 C. y = 4x + 1 D. y = -2x + 9

43. AriPotta

yes

44. xxdgffsdgdfgffgsg

I think this is c Which of the direct variation equations has this graph? http://roads.advancedacademics.com/contentserver/content/roadssection/277812/questions/4-hw7/direct_variation_7.gif A. y = 2/3 x B. y = 3x C. y = 1/2 x D. y = 2x

45. AriPotta

that's a

46. xxdgffsdgdfgffgsg

how ?

47. AriPotta

find the slope between (0,0) and (3,2)

48. xxdgffsdgdfgffgsg

ok found it thanks!

49. xxdgffsdgdfgffgsg

is this b Find the direct variation equation of the graph through the points (0, 0) and (1, -2). Write in y=kx form. A. y = 2x B. y = -2x C. y = 1/2 x D. y = -1/2 x

50. AriPotta

yes, b

51. xxdgffsdgdfgffgsg

thanks

52. xxdgffsdgdfgffgsg

How would I do this step by step Write the slope-intercept equation of the line perpendicular to y = 5/2 x - 2, which passes through the point (0, 2). A. y = 5x + 2 B. y = -2/5x + 2 C. y = 2x + 5 D. y = 1/2x + 5

53. AriPotta

perpendicular lines have negative reciprocal slopes. so our line should have a slope of -2/5

54. AriPotta

now we can put that info into point-slope form

55. xxdgffsdgdfgffgsg

b

56. AriPotta

oh lol. you didn't even need to do any math

57. xxdgffsdgdfgffgsg

so its b

58. AriPotta

yea

59. xxdgffsdgdfgffgsg

would this be c Write the slope-intercept form of the equation parallel to y = 7x + 2, which passes through the point (1, -3). A. y = 7x - 10 B. y = -1/7 x + 2 C. y = 7x - 3 D. y = -7x + 10

60. xxdgffsdgdfgffgsg

or d

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?

62. AriPotta

well it wouldn't be d. parallel lines share the same slope, so it's either a or c

63. xxdgffsdgdfgffgsg

i think c

64. AriPotta

it's a

65. xxdgffsdgdfgffgsg

ok how would i get that on my own? step by step

66. AriPotta

put it into point-slope form, then change it to slope-intercept form

67. AriPotta

y + 3 = 7(x - 1) y + 3 = 7x - 7 y = 7x - 10

68. xxdgffsdgdfgffgsg

ok would this be b The slope of the line perpendicular to y = 3/4 x - 7 is A. 3/4 B. -4/3 C. 4/3 D. -3/4

69. AriPotta

yes, that's b

70. xxdgffsdgdfgffgsg

how would i figure this out Is a shape with the vertices (2, 4), (2, -2), (-1, -2), and (-2, 4) best classified as a parallelogram, rectangle, or neither?

71. AriPotta

ugh. i hate these questions

72. xxdgffsdgdfgffgsg

I almost started to cry when I saw that question

73. AriPotta

lol. i would plot it out first before i did the distance formula

74. xxdgffsdgdfgffgsg

ok

75. xxdgffsdgdfgffgsg

http://roads.advancedacademics.com/contentserver/content/roadssection/277823/questions/5-hw1/662.gif A. n is greater than or equal to -8 B. n is greater than or equal to 8 C. n is greater than or equal to 2 D. n is greater than or equal to -2

76. AriPotta

which do you think?

77. xxdgffsdgdfgffgsg

b

78. AriPotta

yes :)

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Which statement is best represented by http://roads.advancedacademics.com/contentserver/content/roadssection/277825/questions/5-hw2/677.gif A. One fourth times a number is at least 12. B. One fourth times a number is greater than 12. C. One fourth times a number is at most 12. D. One fourth times a number is less than 12.

80. xxdgffsdgdfgffgsg

I was think b or c

81. AriPotta

at most means less than or equal to

82. AriPotta

so it's not c

83. AriPotta

and it would be b if it there wasn't a line underneath the inequality

84. AriPotta

but since there is...it's not b

85. AriPotta

and we know it's not d...

86. AriPotta

so it must be...

87. xxdgffsdgdfgffgsg

Solve the following: b + 4 < -8. A. b < -12 B. b < -4 C. b > 12 D. b > 4

88. AriPotta

which do you think?

89. xxdgffsdgdfgffgsg

b

90. AriPotta

no. what's -8 - 4?

91. xxdgffsdgdfgffgsg

-12

92. AriPotta

yes, so it's a. can you make a new question thread now? lol sorry, but when it gets too long, i start to lag

93. xxdgffsdgdfgffgsg

thanks and ok