Question

What is the y coordinate of the y−intercept of the line that passes through the points
(−2, −2) and (2, 4)?

Answer 1

(x,y) is the basic form.
Here the y-coordinates are 4 and -2.

Answer 2

-2, 4 in the order.

Answer 3

And x coordinates are -2, 2.

Answer 4

3

Answer 5

Yes.

Answer 6

@bitmap Why you say 3?

Answer 7

If you wanna determine the equation y = mx+b for two given points, then first determine the slope, then determine the y-intercept by substituting on of the pair of co-ordinates.

Answer 8

coordinate grid the slope goes through three

Answer 9

I don't remember the formula to put it into y = mx + b form. :/

Answer 10

@bitmap Oh, okay.

Answer 11

i drew a coordinate grid

Answer 12

The slope is:

\(\Large \color{MidnightBlue}{\Rightarrow {y_{2} - y_{1} \over x_{2} - x_{1}} }\)

Answer 13

@bitmap lol no need to do all that.

Answer 14

I got 2 when I used that formula.

Answer 15

it was quicker and easier

Answer 16

it is a small grid

Answer 17

Slope is actually 3/2

Answer 18

ok i suck at math and i tried

Answer 19

Okay, how would I find the y-coordinate now? @bitmap That's okay. :) So do I.

Answer 20

y = (3/2)x + b

Substitute y and x with any of the co-ordinates.

-2 = (3/2)-2 + b
-2 = -3 + b
1 = b

Answer 21

@ bitmap
I appreciate the help you did try to give.

Answer 22

So, the equation is y = (3/2)x + 1

Answer 23

@bitmap good work :)

Answer 24

y intercept is 1.

Answer 25

Is it 1?

Answer 26

either 2 or 3

Answer 27

y-coordinate? what?

Answer 28

@ParthKohli Thanks!

Answer 29

Haha yw

Answer 30

Well my problem wanted the y coordinate of the y−intercept. So it is 1?

Answer 31

Yes.

Answer 32

Thank. You. So. Much.

Answer 33

x-coordinate is 0
y-coordinate is 1.

Answer 34

Do you know what an intercept is?

Answer 35

i tried

Answer 36

@ParthKohli Yeah. :) @bitmap I know, thank you for trying. :)

Answer 37

an intercept is where the slope meets the y axis on the graph

Answer 38

intercept is the value of the variable when the other variable is 0.

Answer 39

@ParthKohli Could you help me with this other one?

What is the slope of the line passing through the point (4, −2) and perpendicular to the line y = 4x + 2? Write your answer as a fraction.

Answer 40

This site explains well :) http://www.purplemath.com/modules/strtlneq3.htm

Answer 41

Is it the same scenario? And okay, I'll take a look at it. :)

Answer 42

@ParthKohli and @bitmap Thanks for your help. :)

Answer 43

your welcome

Answer 44

Heehee

Answer 45

what?