Question

Write the equation of the line with a slope of 3/7 passing through the point (9, -2).

Answer 1

Use the equation:
(y - y1) = m (x - x1)
m = slope = 3/7
(x1,y1) = (9, -2)
And solve =)

Answer 2

im confused..

Answer 3

Okay lets walk thru it step by step: Follow below =)

Answer 4

To find the equation using the slope and an ordered pair we use the equation:
(y - y1) = m (x - x1)

Answer 5

ok..

Answer 6

Now the next step is the PLUG in what you need to plug in.
Since you already have the slope, which is "m" in the equation, plug it into the equation:
(y-y1) = 3/7 (x-x1)

Answer 7

alright..

Answer 8

Next plug in the ordered pairs..Do you know where they go?

Answer 9

x and y?

Answer 10

Not x and y but as (x1,y1) = ( 9,-2)

Answer 11

ok...

Answer 12

So lets plug it all in as we have so far:
(y - (-2)) = 3/7 (x - 9)
The negative two (-2) becomes positive because its already negative and we are also substracting so + 2 ==>
y + 2 = 3/7 (x - 9)

So far?

Answer 13

ok...

Answer 14

Now simply convert this into a y = mx + b format
Distribute 3/7 to (x - 9) =
y + 2 = 3/7x - 27/7

Answer 15

soo y=3/7x+9?

Answer 16

Where did you get + 9 from? O_o

Answer 17

(9,-2) ?? im really not sure

Answer 18

Well okay:
We plugged in the values to get:
(y + y1) = 3/7 ( x -x1)
(y +2) = 3/7 ( x - 9)
Now distribute 3/7 to "x" and "-9" getting:
(y + 2) = 3/7x - 27/7

How did i get 27/7? Well I had to distribute correct? and mulitply - 9 with 3/7 ?
that means
-9 x 3
_______
7

which is equal to -27/7

So far we have:
y + 2 = 3/7x - 27/7

Answer 19

so y=3/7x-2?

Answer 20

Nope..I ll explain

Answer 21

?

Answer 22

y + 2 = 3/7x - 27/7
Bring the 2 to the other side by substracting it from -27/7

Solve this for me:
-27 2
_____ - ___
7 1

Answer 23

When I did that I got -25/7
SO final equation would be:
y = 3/7x - 25/7 =)

Answer 24

well it says the answer is either:
a. 2x-9y=-3/7
b.y=3/7x+9
c.y=3/7x-2
d.3x-7y=41

Answer 25

Hmm its either b or c... thinking

Answer 26

ok

Answer 27

What the...

Answer 28

Oh I beleive its c because the y intercept ("b") is supposed to be -2 in the equation y = mx + b

Answer 29

ok.. thanx!

Answer 30

nO pROBLEM1

Answer 31

What? I don't think you did that right. You were supposed to subtract 2, not assume it's the y intercept

Answer 32

-2 is given as Y1 in the ordered paiir (x1,y1) (9, -2)

Answer 33

You subtracted 2 incorrectly, the y-intercept is not 25/7

Answer 34

its not c?

Answer 35

I'm pretty sure the answer is d

Answer 36

for not so obvious reasons. Looks like someone forgot how to subtract fractions

Answer 37

Before you subtract a whole number from a fraction, you have to remember that the whole number must be converted to a fraction first.

Answer 38

Forget hte math Hero because she doesn't need the answer in y = mx + b format..all you have to do is plug in for x and y? sigh idk

Answer 39

is it still c??

Answer 40

Sigh I am not sure..I believe it C but I am not confident..Hero?

Answer 41

The answer is d

Answer 42

If you pick c, you will be wrong

Answer 43

im REALLY confused.. are you sure its d?

Answer 44

If you're confused its because you don't know how to properly subtract fractions