Question

I need help with math anyone abe to help ?

Answer 1

Hello and Welcome to OpenStudy! :)

what would you like help with?

Answer 2

through: (4,-3), parallel to y = -2x

Answer 3

when a line in parallel to another line, their slopes are the same

so could you tell me the slope of y = -2x ? :)

Answer 4

hint: it's in the form y = mx + b where b=0 and m=slope

Answer 5

y is -3 right cause the x is 4 ?

Answer 6

yes (4, -3) means that x = 4 and y = -3 :)

I would like to know if you could find the slope of y = -2x ?

Answer 7

No my math teacher just gives us work and tells us to do it not explaing a thing

Answer 8

that's alright :) I'll try to help.

there is this form called the slope intercept form
where y = mx + b
where m = the slope (as in how high or low it gets as you move to the right)
and b = y-intercept (where the line crosses the y-axis line)

do you follow so far? :)

Answer 9

Yes

Answer 10

alright :)

so for example if they gave you a equation y = 3x + 5
then the slope would be 3
and the y-intercept would be 5

do you see where I got my numbers? :)

Answer 11

Yeah I see where you got the numbers

Answer 12

so then using that same idea
could you tell me what is the slope of y = -2x ?

Answer 13

is it 2x ?

Answer 14

close :) it would just be the number part of it and don't forget the negative :)

Answer 15

ugh theirs no point in this I'm horrible in math and I have to pass or I will be kicked off all sports and be benched from track now and kicked off sorts next year :(

Answer 16

It's alright, I'll do what I can to help you learn :)

here's another example
like slope of y = -3 x would be -3

then, what is the slope of y = -2 x ?

Answer 17

-2

Answer 18

You got it!!!! :D

AWESOME

so now you would have to make a equation given that the line's slope is -2
and given the point (4, -3)

Answer 19

so now back to the y = mx + b idea
you have now found that m = -2
but now you have to find "b" to complete the equation :)

to find "b" you would Temperately plug in x = 4 and y = -3 into the equation

so solve for "b" given -3 = (-2)*(4) + b

Answer 20

Do I times the (-2)*(4) first ?

Answer 21

Yes :)

Answer 22

-3=-8+b ?

Answer 23

yes! :D

then you would add 8 to both sides to get b alone

Answer 24

5=b ?

Answer 25

DING DING DING WE HAVE A WINNER!!!

so we have m = -2 and b = 5

which you can now plug into y = mx + b to get your equation! :D

Answer 26

-3=-2x+5 ?

Answer 27

close :) the x=4 and y=-3 thing was only a temporary thing to get b

so you get y = -2x + 5

you're really smarter than you think you are :)

Answer 28

oh I get it now YAY I GET IT FOR ONCE !!! :)

Answer 29

yay :D now that wasn't too difficult now was it? :P

Answer 30

No It was easy and I wrote it down in my math notebook to look back at

Answer 31

that's great!!! see, you are smart :)

Answer 32

Thank you xD C: