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

- anonymous

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- AriPotta

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

- AriPotta

##### 1 Attachment

- anonymous

ok I got 3/2 now what

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## More answers

- AriPotta

which choice has 3/2 as the slope?

- anonymous

b

- AriPotta

so that's your answer :)

- 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

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

- anonymous

how do i make it into point slope form

- AriPotta

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

- anonymous

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

- AriPotta

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

- anonymous

where would I put the numbers

- 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

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

- anonymous

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

- AriPotta

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

- anonymous

y+2=(3-1)

- AriPotta

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

- anonymous

so y+2=3-3

- 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

subtract 2 from each side

- anonymous

would that be the right step

- AriPotta

yea

- anonymous

so it's either b or c

- AriPotta

so the answer is..?

- anonymous

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

- anonymous

did i do that wrong

- AriPotta

what's -3 - 2?

- anonymous

-5

- anonymous

so a

- AriPotta

yup

- anonymous

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

- AriPotta

mmk

- 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

yes, it's c :)

- anonymous

k

- 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

yes, that's also c

- 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

yes. it's c lol.

- 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

yes

- 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

that's a

- anonymous

how ?

- AriPotta

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

- anonymous

ok found it thanks!

- 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

yes, b

- anonymous

thanks

- 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

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

- AriPotta

now we can put that info into point-slope form

- anonymous

b

- AriPotta

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

- anonymous

so its b

- AriPotta

yea

- 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

or d

- anonymous

?

- AriPotta

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

- anonymous

i think c

- AriPotta

it's a

- anonymous

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

- AriPotta

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

- AriPotta

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

- 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

yes, that's b

- 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

ugh. i hate these questions

- anonymous

I almost started to cry when I saw that question

- AriPotta

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

- anonymous

ok

- 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

which do you think?

- anonymous

b

- AriPotta

yes :)

- 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

I was think b or c

- AriPotta

at most means less than or equal to

- AriPotta

so it's not c

- AriPotta

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

- AriPotta

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

- AriPotta

and we know it's not d...

- AriPotta

so it must be...

- anonymous

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

- AriPotta

which do you think?

- anonymous

b

- AriPotta

no. what's -8 - 4?

- anonymous

-12

- 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

thanks and ok

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