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

to find the x coordinate we let y=0
likewise, to find the y coordinate we let x=0

Answer 2

so, y=-2(0)-3
and 0=-2x-3..just solve to get the respective coordinates

Answer 3

y=-3


-2x-3=0,
-2x=-3
x=-3/-2
x=3/2

Answer 4

understand?

Answer 5

Sorry i went to the bathroom ^ ^;

Answer 6

ok...

Answer 7

so what are the x intercept as in (x,y)...
and the y intercept as in (x,y) coordinates

Answer 8

1,2,3 for x
and y is 5, 7, 9?

Answer 9

no...please read my 3rd comment

Answer 10

Alright.

Answer 11

ok lets go over x.. intercept

Answer 12

y = -2, 0, 3
x 0 = - 2x -3.

Answer 13

when we want to find the x intercept of a function we let y=0 ie (x,0)
im change the function and replacing it with y=5x-5 ok as and example
so, 0=5x-5..we replace y and put 0
we now solve for x
5x-5=0
5x-5+5=+5
5x=5
we then divide both sides of the equation by 5 to solve for x
5x/5=5/5
x=1..

Answer 14

Alright thanks. Do i need to make a graph?

Answer 15

not always only if the question ask you to...so our x intercept for the given example would be (1,0)

Answer 16

Alright. Thanks a lot you'r a self savor :)

Answer 17

do u understand the y intecept part...if not i will go it over ok

Answer 18

It intercepts at 0 right?

Answer 19

we let the x intercept =0 ie (0,y) and we solve for y...what would be the y intercept for the given example i just give?

Answer 20

this one y=5x-5

Answer 21

x is equal to 0?

Answer 22

yes we let x=o and solve for y
y=5(0)-5

Answer 23

Wouldn't that be 0 too?

Answer 24

no

Answer 25

y=5*0-5
y=0-5
y=-5

Answer 26

Okay. Think i got it now 5*0 = 0 and 0 subtracted by -5 is just negative 5.

Answer 27

-5*

Answer 28

yes now put it in coordinate form..(x,y) we get..

Answer 29

x= 0 and y= -5

Answer 30

very good (0,-5)

Answer 31

Thanks. I suck at math. XD

Answer 32

no problem but remember that was the intercepts for the example i give not for the problem you give ok

Answer 33

Yeah totally understand. That's why i try in solve them before i post them unless i really have no clue where to start.

Answer 34

ok just to note also in the case of sketching a graph..the x intercept is where the line/curve cuts the x axis on the graph...and the y intercept is where the line/curve cuts the y axis on the graph.

Answer 35

Alright kool.