Question

Help Please! Medals for help!

Create a quadratic function, f(x), in vertex form. The a should be between 4 and –4, the h will be your birth month, and the k will be your birth day. Write your equation below.

Using complete sentences, explain how to convert your birthday function into standard form.

Graph your function. Include your graph below.

Using complete sentences, explain how to find the average rate of change for f(x) from x = 4 to x = 7.

Answer 1

My birthday is 10/7

Answer 2

@campbell_st @Donblue22 @abb0t @katragaddasaichandra @StudyGurl14 @wesley747 @XxAminaxX @HelpBlahBlahBlah @vita955 @nerdgirl6 @lizzyrockefeller @lordofpens @thekakashigaming @Frosty_Flow @bahrom7893 @brucebaner @iheartfood @Jesstho.-. help?

Answer 3

whos this?

Answer 4

huh?

Answer 5

how do you know my @

Answer 6

i just type in @ and a letter then names of people online shows up

Answer 7

oh

Answer 8

can you help me? @thekakashigaming

Answer 9

.......................

Answer 10

What up?

Answer 11

Could someone help me with my question?

Answer 12

ok.... so of you are born on 30th june

so you need a value of a.... you can choose....

the standard form I use is

\[(x - h)^2 = 4a(y - k)\]

wheere (h, k) is the vertex and a is the focal length....

using the the example date h = 6 and k = 30

then what you probably have to do is make y the subject.

hope that makes sense

Answer 13

:/ it helps a litte

Answer 14

Could someone help me step by step?

Answer 15

you could be really cheeky and chose a = 0

ok... what is the birth month and birth day

Answer 16

10/7

Answer 17

ok.... so based on the information the vertex is (birth month, Birth day)

so ( 10, 7) which means h = 10 and k = 7

so using the standard form I posted above you have

\[(x - 10)^2 = 4a(y - 7)\]

next you need a value of a

Answer 18

A would be between 4 through -4

Answer 19

so what are you choosing....?

Answer 20

i'm going with 3

Answer 21

ok...
so then you have

\[(x - 10)^2= 12(y - 7)\]

so now make y the subject if your vertex from is

\[y = p(x - h)^2 + k\]

Answer 22

do i use 4 for x

Answer 23

well using the form I posted above... divide both sides of the equation by 12 and then add 7...

hope it makes sense

Answer 24

:/ why divide by 12

Answer 25

in my class, we use the formula f(x) = ax^2 + bx^2 + c

Answer 26

but i dont understand it

Answer 27

@campbell_st ?

Answer 28

....

Answer 29

anyone?

Answer 30

you want y as the subject

so

\[y - 7 = \frac{1}{12}(x - 10)^2\]

so

\[y = \frac{1}{12}(x - 10)^2 + 7\]

which is a vertex form...


expand the quadratic

Answer 31

do you solve both sides of the equation? sorry if im asking too many questions

Answer 32

can you help explain also, @Jesstho.-. and @Firejay5 ?

Answer 33

......

Answer 34

(-)_(-)

Answer 35

Hello @adoomyG maybe I can help you.

Answer 36

First, you know vertex form is y=a(x-h)^2+k
So plug your birthday numbers into that.

Answer 37

you then expand the perfect square

\[y = \frac{1}{12}(x^2 - 20x + 100) + 7\]

now simplify this.