Question

Writing the slope-intercept?

1. Write the slope-intercept form of the line which passes through (4,2) with a slope of 1/2
a. y=1/2 x+2
b. y=1/2x
c. y=1/2 x+4

2. Write the slope-intercept equation for the line through (3,7) & (9,3)
a. y=-3/2x+7
b. y=-2/3x+9
c. y=3/2x+3

3. Write the slope-intercept form of the equation of the line parallel to y=5x+2, which passes through the point (4,9).
a. y=5x-11
b. -5x+9
c. y=-1/5-11

Please, help me.

Answer 1

Is there a formula that I'm supposed to use to figure this out?

Answer 2

What numbers do I put in that? Like can you show me?

Answer 3

I got y=12x+4

Answer 4

oops y=1/2x+4

Answer 5

Oh! So I 1/2 the 4 to get 2?

Answer 6

x and y are (4,2)

Answer 7

So, it's y = 1/2 x + 4

Answer 8

I got y=1/2x+2

Answer 9

That's one of the answer choices

Answer 10

Is that correct, or...?

Answer 11

it's wrong.. it's y=mx+b

Answer 12

sorry, hang on.

Answer 13

Okay...

Answer 14

Plug the (4,2) y=mx+b to get the b.

Answer 15

Okay... 2=1/2(4)+b

Answer 16

sorry for confusing you/

Answer 17

keep going

Answer 18

It's fine, but I'm counfused because what you gave me doesn't match my answer choices

Answer 19

it was for point-slope

Answer 20

So... it is y=1/2x?
For number 1?

Answer 21

yes

Answer 22

OH, okay, can you help me on the next 2?

Answer 23

On number 2, I got y-1=3(x+2), is that right?

Answer 24

Oops, total wrong problem

Answer 25

I mean.....

Answer 26

is it still y=mx+b?

Answer 27

OR another formula?

Answer 28

First, find the slope: m=y2-y1/x2-x1

Answer 29

Okay

Answer 30

I got m=3-7/9-3

Answer 31

Your two ordered pairs are (3,7) and (9,3).

Your x1=3, x2=9

your y1=7, y2=3

Answer 32

evaluate it to get your slope.

Answer 33

Okay

Answer 34

Don't worry, you will get used to this...you're helping me to remember all of these problems again.

Answer 35

m= -4/6

Answer 36

when you get your slope, use the point-slope formula: y-y1=m(x-x1)

Answer 37

Okay, so I'm confused with #2 is the slope -4/6?

Answer 38

Then evaluate to get your slope-intercept

Answer 39

yes.

Answer 40

you can choose from your two ordered pairs.

Answer 41

Oh okay

Answer 42

I chose the first on and I got 7=-4/5(3)+b

Answer 43

after that, you will use y=mx+b to get your slope-interecept form of the line

Answer 44

Okay, is it y=3/2 +3?

Answer 45

you're doing fine.. just keep going until you have your b=?

Answer 46

Oh, wait, I'm confused, how do I find b?

Answer 47

olyviaevans
Medals 0

I chose the first on and I got 7=-4/5(3)+b

Answer 48

you finish it. remember to isolate your variable.

Answer 49

Oh, okay. I got y=-2/3x+9

Answer 50

Did you realize your mistake on your slope?

Answer 51

m= -4/6= -2/3

Answer 52

No, what mistake?

Answer 53

Oh

Answer 54

when you write -4/5, i was waiting for you to find it out yourself. :)

Answer 55

Oh, I didn't catch it.

Answer 56

just keep practicing.. it will come in handy.

Answer 57

OK, thanks.

Answer 58

yw