Question

Algebra help please?

Compare and contrast these four functions using complete sentences. Focus on teh slope and y-intercept first, and then on any additional properties of each function.

I alread have some of it, but I need some help.

Answer 1

Here are the four functions:

Answer 2

give me answer chice

Answer 3

I already have that f(x) = 2x + 5 and it gives me j(x) = 2x - 5.
I think g(x) = 4x - 8 and h(x) = 2x - 1 but I'm not sure of those two are correct.

Answer 4

It's an essay question, not multiple choice

Answer 5

idk

Answer 6

@Nnesha
Do you think you can help?

Answer 7

for h(x) line is increasing or decreasing ?

Answer 8

decreasing

Answer 9

It's starting at the five and going over 1 and down 2. I don't know how to write that though.

Answer 10

so what does it means ?

Answer 11

slope would be what ?

Answer 12

1/2?

Answer 13

nope if line is decreasing then slope would be negative

Answer 14

Oh yeah, so it'd be -1/2?

Answer 15

yes

Answer 16

nope 2 is right
slope is rise over run = 2/1 =2 it's decreasing so would be negative

Answer 17

Oh okay. So the function would be h(x) = 5x - 2?

Answer 18

hmm y-intercept is a point where line intersect y-axis
y=mx+b where m is slope b is y-intercept

Answer 19

y = mx + b
sooo
h(x) = -2x + 5

Answer 20

yes right

Answer 21

Okay, thank you. Now what about the g(x) function. Did I get that equation right?

Answer 22

nope slope and y-intercept both are wrong try again show ur work so i can find out the mistakes :=)

Answer 23

Well I said it was g(x) = 4x - 8 because under the x column it is increasing by 4 and under the g(x) colume it is increasing by -8.

Answer 24

x isn't increasing by 4
would you add 4 with -2 to get 2 ?

Answer 25

Yes... -2 + 4 = 2 then 2 + 4 is 6

Answer 26

Even my calculator says that -2 + 4 is 2

Answer 27

hmm that's not a good way to find slope
you should use slope formula

Answer 28

y-intercept isn't 8

Answer 29

g(x) is increasing by -8 though. -1 - 8 = -9 and -9 - 8 = -17

Answer 30

that's not right
slope isn't 4
use the slope formula \[\huge\rm \frac{ y_2 -y_1 }{ x_2 -x_2 }\]

Answer 31

wait a sec
i see

Answer 32

I don't have coordinates so I can't use that formula.

Answer 33

that's the difference of y's and x's
y's =-8
x's = 4

Answer 34

so replace y_2 -y_1 = -8
and x_2 - x_1 =4
that would give you slope

Answer 35

I don't understand what you're telling me to do.

Answer 36

coordinates