anonymous
  • anonymous
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
Mathematics
katieb
  • katieb
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AriPotta
  • AriPotta
find the slope between (0,-4) and (2,-1)
AriPotta
  • AriPotta
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anonymous
  • anonymous
ok I got 3/2 now what

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AriPotta
  • AriPotta
which choice has 3/2 as the slope?
anonymous
  • anonymous
b
AriPotta
  • AriPotta
so that's your answer :)
anonymous
  • anonymous
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
AriPotta
  • AriPotta
put the information in point-slope form, then change it into slope-intercept form
anonymous
  • anonymous
how do i make it into point slope form
AriPotta
  • AriPotta
point-slope form is y - y1 = m(x - x1)
anonymous
  • anonymous
I know that but how to I fill that in to then make it slope intercept form
AriPotta
  • AriPotta
you put the numbers in first, then you can rearrange to make it into slope-intercept
anonymous
  • anonymous
where would I put the numbers
AriPotta
  • 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
anonymous
  • anonymous
would y and x not y1 and x1 but y and x become 0
anonymous
  • anonymous
also would it look like this y--2=3(x-1)
AriPotta
  • AriPotta
yes. y + 2 = 3(x - 1). now distribute the 3 into the parentheses
anonymous
  • anonymous
y+2=(3-1)
AriPotta
  • AriPotta
no, to distribute, you have to multiply 3 with x, and 3 with -1
anonymous
  • anonymous
so y+2=3-3
AriPotta
  • 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
anonymous
  • anonymous
subtract 2 from each side
anonymous
  • anonymous
would that be the right step
AriPotta
  • AriPotta
yea
anonymous
  • anonymous
so it's either b or c
AriPotta
  • AriPotta
so the answer is..?
anonymous
  • anonymous
when i calculate it it comes up with y=3x-1 but that isn't an answer
anonymous
  • anonymous
did i do that wrong
AriPotta
  • AriPotta
what's -3 - 2?
anonymous
  • anonymous
-5
anonymous
  • anonymous
so a
AriPotta
  • AriPotta
yup
anonymous
  • anonymous
thanks if I have any other questions I will send you a message
AriPotta
  • AriPotta
mmk
anonymous
  • anonymous
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
AriPotta
  • AriPotta
yes, it's c :)
anonymous
  • anonymous
k
anonymous
  • anonymous
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)
AriPotta
  • AriPotta
yes, that's also c
anonymous
  • anonymous
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
AriPotta
  • AriPotta
yes. it's c lol.
anonymous
  • anonymous
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
AriPotta
  • AriPotta
yes
anonymous
  • anonymous
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
AriPotta
  • AriPotta
that's a
anonymous
  • anonymous
how ?
AriPotta
  • AriPotta
find the slope between (0,0) and (3,2)
anonymous
  • anonymous
ok found it thanks!
anonymous
  • anonymous
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
AriPotta
  • AriPotta
yes, b
anonymous
  • anonymous
thanks
anonymous
  • anonymous
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
AriPotta
  • AriPotta
perpendicular lines have negative reciprocal slopes. so our line should have a slope of -2/5
AriPotta
  • AriPotta
now we can put that info into point-slope form
anonymous
  • anonymous
b
AriPotta
  • AriPotta
oh lol. you didn't even need to do any math
anonymous
  • anonymous
so its b
AriPotta
  • AriPotta
yea
anonymous
  • anonymous
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
anonymous
  • anonymous
or d
anonymous
  • anonymous
?
AriPotta
  • AriPotta
well it wouldn't be d. parallel lines share the same slope, so it's either a or c
anonymous
  • anonymous
i think c
AriPotta
  • AriPotta
it's a
anonymous
  • anonymous
ok how would i get that on my own? step by step
AriPotta
  • AriPotta
put it into point-slope form, then change it to slope-intercept form
AriPotta
  • AriPotta
y + 3 = 7(x - 1) y + 3 = 7x - 7 y = 7x - 10
anonymous
  • anonymous
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
AriPotta
  • AriPotta
yes, that's b
anonymous
  • anonymous
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?
AriPotta
  • AriPotta
ugh. i hate these questions
anonymous
  • anonymous
I almost started to cry when I saw that question
AriPotta
  • AriPotta
lol. i would plot it out first before i did the distance formula
anonymous
  • anonymous
ok
anonymous
  • anonymous
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
AriPotta
  • AriPotta
which do you think?
anonymous
  • anonymous
b
AriPotta
  • AriPotta
yes :)
anonymous
  • anonymous
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.
anonymous
  • anonymous
I was think b or c
AriPotta
  • AriPotta
at most means less than or equal to
AriPotta
  • AriPotta
so it's not c
AriPotta
  • AriPotta
and it would be b if it there wasn't a line underneath the inequality
AriPotta
  • AriPotta
but since there is...it's not b
AriPotta
  • AriPotta
and we know it's not d...
AriPotta
  • AriPotta
so it must be...
anonymous
  • anonymous
Solve the following: b + 4 < -8. A. b < -12 B. b < -4 C. b > 12 D. b > 4
AriPotta
  • AriPotta
which do you think?
anonymous
  • anonymous
b
AriPotta
  • AriPotta
no. what's -8 - 4?
anonymous
  • anonymous
-12
AriPotta
  • 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
anonymous
  • anonymous
thanks and ok

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