Question

Which is the equation to the line passing through points (2, -7) and (5, -1)?

Answer 1

y = 2x - 8
y = - 2x + 9
y = 2x - 11
y = - 2x + 6

Answer 2

those are the answers.

Answer 3

do u know how to find slope when 2 points are given ?

Answer 4

No

Answer 5

The slope of the line through points (x1,y1) and (x2,y2) is given by :
\(\huge m=\frac{y_1-y_2}{x_1-x_2}\)
now,just put the values and find m.

Answer 6

could u find m=... ?

Answer 7

No, im having a difficult time, i think its due to the early-ness. haha

Answer 8

\(\huge m=\frac{y_1-y_2}{x_1-x_2}=\frac{-7-(-1)}{2-5}=...?\)

Answer 9

-6/-3

Answer 10

m= -6/-3 = ..... ?

Answer 11

It might be easier if you have a graphing calculator. Make a line that looks like:

y=(2/3)x

and then change the slope around a bit to figure it out and see why the slope is rise/run by going to the "trace" option on your calculator and trying things out, like when x=3.

Answer 12

2

Answer 13

yes, m=2

Answer 14

Now use the first points given and the slope. Plug it into the equation:

y - y1 = m(x - x1)

Answer 15

now take any point, say (5,-1)
and put it in y - y1 = m(x - x1)

Answer 16

x1=5,m=2,y1=-1
isolate y

Answer 17

-_-

Answer 18

Tina, let me make it easier for you.

y - y1 = m(x - x1)

y - (-1) = 2(x - 5) <-- Solve for y

Answer 19

Good lord this is terrible. I feel so confused.

Answer 20

Okay. What are you confused with?

Answer 21

Nothing. I think i'm going to skip this! I have to have it done by later tonight. I think im going to rest now haha thanks though:)

Answer 22

Bye.