Question

Find the equation of the line below. Arrange your answer in the form y = mx + b, where b is the constant.where (-2,2),(2,-2)

Answer 1

These questions may help you:
(a) What is the slope of the equation?
(b) Can you express the equation in point-slope form?
(c) Can you convert that to slope-intercept form?

Wish you all the best :D

Answer 2

I am having the problem solving this question

Answer 3

Where are you stuck, a b or c?

Answer 4

Kind of all of them.i have trouble this kind of thing

Answer 5

well let me just say c i guess.

Answer 6

If you are given two points, you can calculate the slope with the following formula:
\[\Large m=\frac{\color{green}{y_2}-\color{blue}{y_1}}{\color{green}{x_2}-\color{blue}{x_1}}\]

Answer 7

so would the answer be 0 because all of the coordinates are all 2

Answer 8

You still have to plug the coordinates in, 2 and -2 are different :)

Answer 9

oh,duh. now i understand.then i would divide the answer i get from subtracting the coordinates

Answer 10

What have you got now then? :)

Answer 11

i have -1?

Answer 12

yep, the slope is -1.

Do you remember the point-slope form?

Answer 13

isn't -1 the point slope form?

Answer 14

-1 is the slope, not "the equation of the line in point-slope form".

Answer 15

http://zonalandeducation.com/mmts/functionInstitute/linearFunctions/psPic.gif

Answer 16

so how would i find the point-slope?

Answer 17

You would plug a point in the line named (x1,y1) and the slope named m in the following equation:
\[y-y_1=m(x-x_1)\]

Answer 18

so i would put, y-(-2)=1(x-(-2)?

Answer 19

firstly, (a) which point did you choose?
(b) what was the slope again?

Answer 20

the slope was -1 and i choose point -2

Answer 21

a point has both an x-coordinate and a y-coordinate, one number doesn't make a point :)

Answer 22

so i should have put -2 and 2?

Answer 23

yes, -2 as x1 and 2 as y1

Answer 24

sorry I got to go now, if you want to check, the answer is y=-x, cya :D

Answer 25

thanks