Question

What is the equation of the line that passes through the points (−1, 3) and (1, 11)?

Answer 1

do you know the formula to find slope ?

Answer 2

y=mx+b

Answer 3

that's the equation we need it later
but first we have to find slope \[\huge\rm \frac{ y_2 -y_1 }{ x_2 -x_1 }\]
and plug in order pair where x and y are \[\huge\rm (x_1 ,y_1) (x_2 ,y_2) \]

Answer 4

so it would be 11-3 over 1-(-1)

Answer 5

yes yes right !! :=) solve

Answer 6

8 over 2

Answer 7

then it would be 4

Answer 8

yes right now use that equation plug in m balue
m=slope
and pick one of order pair replace xand y by their values solve for b

Answer 9

ok thank u

Answer 10

let me know what you get!

Answer 11

i dont understand what u said^

Answer 12

cool and thanks for telling me :=)
so \[\huge\rm y = mx+b\]
m=4 now you can pick one of order pair where x and y values are (x,y)
and then substitute into the equation
let's say (1,11) so replace x by 1 y by 11
and m by 4 solve for b

Answer 13

7?

Answer 14

\[\huge\rm \color{red}y=\color{green}{m}\color{blue}{x}+b\]
\[(\color{blue}{1},\color{Red}{11})\]

Answer 15

is the answer 7

Answer 16

yes b =7
\[\huge\rm y=\color{green}{m}{x}+\color{ReD}{b}\]
m=4
b=7
plug in &&& done!

Answer 17

omg thanks

Answer 18

my pleasure