Question

14. For the function rule y = -2x - 3, provide the x-y coordinates of the y-intercept and the x-intercept. Show your work.

Answer 1

For the y intercept

This is in y=mx+b form

y=-2x-3

b= y intercept.

For the x intercept, set -2x-3 to zero

so -2x-3=0

-2x=3

solve for x.

Answer 2

y-intercept means x=0
x-intercept means y=0

Answer 3

how do i solve the x

Answer 4

can you give me sample how to solve it please

Answer 5

-2x=3

divide both sides by -2

Answer 6

y=mx+b
when y=0 => mx=-b
when x=0 => y=b

Answer 7

2x/2=-x
3/2=-1.5
I still dont under stand

Answer 8

I have to have step by step

Answer 9

y intercept
y=-2x-3
x=0 at y-intercept
y=-2(0)-3
y=-3

Answer 10

x intercept
y=-2x-3
y=0 at x intercept
0=-2x-3
add +3 for both sides
3=-2x-3+3
3=-2x
divid by -2 for both sides
3/-2=-2/-2x
3/-2=x =>x=-3/2

Answer 11

which one is which and how do I solve y

Answer 12

I'll go over it again.

Answer 13

y=-2x-3

y intercept is simply at y=mx+b

b is your intercept.

Answer 14

For the x intercept

-2x-3=0 (set it to zero)

-2x=3

divide by -2

x=-1.5

Answer 15

understood?

Answer 16

not really

Answer 17

Which part?

Answer 18

none of it how do i get the inercept y

Answer 19

Your original equation is y=-2x-3 right?

Answer 20

That linear equation is in the form of y=mx+b

Answer 21

When it is in that form, the value of b is the y intercept

Answer 22

What is your y intercept..?

Answer 23

b how do i write it

Answer 24

What is the value of "b" in y=-2x-3?

Answer 25

I dont know alright lets start over from the beginning please cause you telling me to divide 2 to something & I dont know what to divide it too. Can you go step by step but lets do x intercept first then y intercept

Answer 26

I am sorry it is taken so long to reply my computer keeps acting up

Answer 27

Ok so x intercept first..

y=-2x-3

To find the x intercept you must get y as 0...

so -2x-3=0

now you need to isolate and solve for x

-2x=3

divide by -2 to get rid of the -2 in the x

and you get x=-1.5

Answer 28

i put -2x-3 and it didnt come up with notin

Answer 29

what do divide he -2 too

Answer 30

read my explanation again

Answer 31

i can't explain it any better

Answer 32

Do i write the way you just wrote it

Answer 33

sure as long as you understand it

Answer 34

I dont understand algebra at all

Answer 35

i can't really help you unless you tell me which part is actually confusing

Answer 36

Alright you saying -2x-3=0 how are you getting that

Answer 37

The original function was y=-2x-3

to get x intercept, y must equal 0, as every x intercept coordinate is (x,0)

so you set it to zero, and solve for x

Answer 38

how do i solve the x

Answer 39

-2x-3=0

put x alone by adding 3

-2x=3

divide by -2

x=-1.5

Answer 40

So I divide -2x=3 by 2

Answer 41

-2

Answer 42

I just tried to divid that by 2

Answer 43

-2x=3

-2 divided by -2=1 or x

3 divided by -2=-1.5

x=-1.25

Answer 44

got it but from y=-2x-3 how did you get -2x-3=0

Answer 45

got it now y intercept