Question

Write the equation of the line in slope-intercept form with a slope of 3 and a y-intercept of -2.

Answer 1

pls help me

Answer 2

So slope intercept form is y=mx+b correct?

Answer 3

yes

Answer 4

So the first step is to insert the numbers into the equation.

m is the slope
and y is the y-intercept

Answer 5

so -2=3x+b

Answer 6

So it's -2=3x+b

Answer 7

Did they give you a number for x?

Answer 8

no

Answer 9

so thats why i am confused

Answer 10

wait so do i just put -2=3x+b

Answer 11

No, you need b. But I don't know how to find that.

Answer 12

oh ok can you help me find someone that can?

Answer 13

@ganeshie8

Answer 14

@jim_thompson5910

Answer 15

@JA1

Answer 16

So sorry I was no help!

Answer 17

its ok @SoccerManiac

Answer 18

In general y = mx+b is slope intercept form

m is the slope
b is the y-intercept


so because the slope is 3, this means m = 3
because the y-intercept is -2, we know that b = -2


plug this in to get

y = mx + b

y = 3x + (-2)

y = 3x - 2

Answer 19

wait so b is -2?

Answer 20

@jim_thompson5910

Answer 21

correct

Answer 22

ok so basically there is no y? @jim_thompson5910

Answer 23

what do you mean?

Answer 24

like in y=mx+b @jim_thompson5910

Answer 25

well x and y are variables that are allowed to change (and aren't fixed)

so that's why you can't just replace y with some fixed number like you can with m and b

Answer 26

so the answer would be y=3x-2?

Answer 27

@jim_thompson5910

Answer 28

yep, that is correct

Answer 29

@jim_thompson5910 ok well thank u so much

Answer 30

you're welcome

Answer 31

ocean are you good with this stuff?

Answer 32

you should check out youtube khan academy videos about this stuff, u ll learn a lot of stuff