Question

I really need help with these. they are the ones I couldn't do myself im in a hurry please all the help is much appreciated!!!
What is the equation of the line that passes through the points (1,2/3) and (-1,-1)
A. Y=-6X+5
B. 5/6X- 1/6
C.Y=2/3 X+1/5
D.Y=6/5X+1/5

Answer 1

What is the equation of the line that has a slope of -1/3 and a y-intercept of 5/2
A.y=1/3x+ 5/2
B.y=-1/3 x + 5/2
C.y= 5/2 x-1/3
D. y=5/2 x +1/3

Answer 2

Using point-slope form, write the equation of the line that passes through the point (-1/2,1/2) and has a slope of -1
A. y-1/2=-x-1/2
B.y-1/2=-x+1/2
C.y+1/2=-x-1/2
D.y+1/2=-x+1/2
I think its b but im not forsure I would like some help

Answer 3

The equation of a line is y = 2x + 3. What is the equation of the line that is parallel to the first line and passes through (2, –1)?




A.

4x – 2y = –6


B.

y = 2x – 5


C.

y = 3x + 4


D.

2x + y = –1

Answer 4

@sloths

Answer 5

@sloths if you cant figure them out its okay thankyou for looking at them

Answer 6

haha give me a minute to look them over

Answer 7

okay

Answer 8

i'm having computer difficulties i'm so sorry this is taking so long

Answer 9

first question is y+5/6-1/6

Answer 10

because that's the only one with the correct slope

Answer 11

For the first question, plug the 2 points in each equation and see which one checks.

Answer 12

no your okay if you cant get them its alright
thankyou!! I see yeah

Answer 13

For the second question, this is how the equation of a line looks like y=mx+b, with m being the slope and b the y-intercept.

Answer 14

last question is b. can't really explain because i graphed it out haha

Answer 15

aha its okay thankyou guys so much most people ignore me!

Answer 16

haha sure whenever i'm online i'll try to help

Answer 17

Two lines are parallel when they have the same slope. To check which one passes through the point (2, –1), plug it in all the equations that have the same slope.

Answer 18

so the second one would be D? or C? im thinking more D than c

Answer 19

It's not c or d. This is the form y=mx+b
m : slope.
b : y-intercept.

Answer 20

third one is y-1/2=x+1/2

Answer 21

you just plug the numbers into the point slope formula which is y-y1=m(x-x1)

Answer 22

I have to go now. I'll be back later.

Answer 23

then its b? or am I wrong again

Answer 24

second one is b

Answer 25

got you! oh my gosh thank you so much for your help seriously!

Answer 26

haha sure, any time

Answer 27

Yeah b is correct.

Answer 28

For the third question, are you sure these are the correct choices :
A. y-1/2=-x-1/2
B.y-1/2=-x+1/2
C.y+1/2=-x-1/2
D.y+1/2=-x+1/2
Because D and A are the same and they are both correct.

Answer 29

D and A are different because A is y minus 1/2 and D is y plus 1/2

Answer 30

but neither of those are correct, it's b

Answer 31

@sloths simplify both and you'll see.

Answer 32

the formula is y-y1=x-x1
y-1/2=x+1/2

Answer 33

And for b, if you plug in (-1/2,1/2) you'll get:
1/2-1/2=-(-1/2)+1/2
0=1

Answer 34

The one you gave doesn't figure on the choices.

Answer 35

@sloths this the formula y - y1 = m(x - x1)
m : the slope which in our case =-1

That would give you y - 1/2 = - (x + 1/2)

Answer 36

which is still b

Answer 37

y - 1/2 = - (x + 1/2) => y - 1/2 = -x - 1/2